The voltage drop across an inductor in a circuit with a dc voltage source at time>> 5*time-constant is more than as compared to first case because the voltage across the inductor is proportional to the rate of change of current which is a maximum at the start when the current and the voltage across the resistor are zero.
As time progresses the current increases at a slower rate as does the voltage across the resistor but the voltage across the inductor decreases.
The voltage drop is proportional to the current, which is the rate-change of the charge. Inductors: V = L (DI/Dt). The voltage drop across the inductor is proportional to the rate-change of the current.
How do you calculate voltage drop in an inductor?The formula which calculates the inductor voltage is
V= Ldi/dt,
where,
V is the voltage across the inductor,
L is the inductance of the inductor,
di/dt is the derivative of the current flowing across the inductor.
Thus from the above conclusion we can say that The voltage drop across an inductor in a circuit with a dc voltage source at time>> 5*time-constant is more than as compared to first case because the voltage across the inductor is proportional to the rate of change of current which is a maximum at the start when the current and the voltage across the resistor are zero.
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Select the correct answer from each drop-down menu. complete the sentence to describe the distance and ruler postulates. between every pair of distinct points, there is a positive unique number called the , which can be determined as the of the corresponding real numbers of the two points.
This question is an illustration of the distance postulate.
What is distance postulate ?The distance between any two different points equates to a single positive real integer, according to the postulate of distance.
The full text is: The distance is a positive unique integer between every pair of different locations.
Consider two separate points A and B as an example.
The distance between A and B is the integer that represents the size of A and B.
The positive number (i.e. the distance) between A and B would be:
d= B-A
d = 6 - 1
d = 1
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A current of 0.4 A flows through a wire. How many electrons flow through a cross section of
the wire in one hour?
(Ans. e = 1.6 x 10-¹9 C
diameter? mm carries a steady current of 0.3142 A. Find the magnitude of
9 × 10²¹ electrons flow through a cross section of the wire in one hour.
What is the relation between current and charge?Mathematically, current = charge / timeIn S.I. unit, Charge is written in Coulomb and time in second. What is the amount of charge flown through a wire for one hour if it carries 0.4 A current?Charge= current × timeCurrent= 0.4 A, time = 1 hour= 3600 sCharge= 0.4× 3600= 1440 C
How many numbers of electrons present in 1440C of charge?One electron= 1.6 × 10^(-19) CSo, 1440 C = 1440/1.6 × 10^(-19)= 9 × 10²¹ electrons
Thus, we can conclude that the 9 × 10²¹ electrons flow through a cross section of the wire in one hour.
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Which would be represented by FN on a force diagram?
O Northern Force
O Newton Force
O Normal Force
O Negative Force
The acronym FN on a force diagram would represent Normal Force. That is option C.
What is a force diagram?A force diagram is the type of diagram that illustrates the different types of forces acting on an object.
The types of forces that can be represented by a force diagram include the following:
Applied Force.Gravitational Force.Normal Force.Frictional Force.Air Resistance Force.Tension Force.Spring Force.The normal force (FN) is the force that is acting of the object which is perpendicular to the surface the object is in contact with.
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Answer:
C~
Explanation:
Fn is normal, if it's negative then it's most likely -Fn.
Have a good day.
If the current through an inductor were doubled, the energy stored in the inductor would be.
Answer:
The energy stored in an inductor is given as:
EL=1/2 LI ²
So, when the current is doubled, the energy stored in the inductor will become 4 times.
Which gear combination would you like to use when you want to pedal with as few strokes as possible and have your wheels turn as many times as possible
I NEED A SERIOUS ANSWER PLS. I WILL MARK YOU BRAINLIEST!
Answer:
The Object distance is 53.125cm. So the right option will be Option (c)
Explanation:
The converging lens has focal length positive, so it means:
f=17cm
As the real image is formed so the distance of the image will be taken as positive. Let it is represented by q, So:
q=25cm
Let the distance of object is p, it will obtained from the following formula:
A collection of a fixed number of elements (called components) arranged in n dimensions ( n >= 1) is called a(n) ____.
A collection of a fixed number of elements (called components) arranged in n dimensions ( n >= 1) is called a(n) n- dimensional array
an array of dimensions gives Information about the material composition for each point in the heterogeneous part is stored in N.
Similar to a one-dimensional array, a two-dimensional array is represented graphically as a grid (or table) with rows and columns.
A big gathering of objects or people is referred to as a "array," especially one that is eye-catching, inspires admiration, or has been arranged in a particular way: The spread of food on the table was magnificent. They were seated in front of numerous microphones and cameras. Related words and phrases are part of the SMART Vocabulary. Things in groups and collections
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Savanna regions developed during the Triassic period.
Please select the best answer from the choices provided
T
F
If the magnitude of the sum of two vectors is greater than the magnitude of either vector, then?
If the magnitude of the sum of two vectors is greater than the magnitude of either vector, then scaler product will always be positive
A vector is a quantity or phenomenon that has two independent properties: magnitude and direction. The term also denotes the mathematical or geometrical representation of such a quantity.
The scalar product of two vectors is the sum of the product of the corresponding components of the vectors. In other words, the scalar product is equal to the product of the magnitudes of the two vectors and the cosine of the angle between them. It is a scalar quantity and is also called the dot product of vectors.
if | a + b | > |a| or |b|
a. b = |a| |b| cos (theta)
since , | a + b | > |a| or |b|
hence, angle between a and b must be less than 90°
since , |a| and |b| are positive
cos (theta ) will also be positive as angle is between 0° and 90°
hence , cos (theta ) will be positive
hence scaler product will always be positive
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A thin hoop with a radius of 10 cm and a mass of 3.0 kg is rotating about its center with an angular speed of 3.5 rad/s. What is its kinetic energy? group of answer choices
The kinetic energy is 1.8 × 10^ -1 J.
Rolling items each rotate and have linear (or translational) movement. consequently, they've both linear and rotational kinetic power. since the rotational kinetic strength of a rolling object depends at the inertia of the item.
The only kinetic energy involved here is rotational kinetic energy.
Kinetic Energy (Rotational) = 1/2Iω²
I = Moment of Inertia of a thin hoop =(Mass)(Radius)2
Mass = 3.0 kg
Radius = 10 cm = 0.10 m
ω = angular speed = 3.5 rad/s
Kinetic Energy (Rotational) = 1/2 * 3 * 12.25 J.
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The Kinetic energy is of thin hoop can be found out using the formulas of Rotational Kinetic Energy. The Kinetic Energy of the hoop is 18.375J.
Rolling items rotate and have linear or translational movement. consequently, they have both linear and rotational kinetic power. Since the rotational kinetic strength of a rolling object depends on the Inertia of the item.
The only kinetic energy involved here is Rotational Kinetic Energy.
Rotational Kinetic Energy = 1/2Iω²
where, I = Moment of Inertia of a thin hoop =(Mass)(Radius)²
where, Mass of hoop, m = 3.0 kg
Radius of loop, R = 10 cm = 0.10 m
Angular speed, w= 3.5 rad/s
Since, Rotational Kinetic Energy = 1/2 × 3 × 12.25 J.
Rotational Kinetic Energy = 18.375J
Hence, Rotational Kinetic Energy is 18.375J
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What are the two decisions that you can make from performing a hypothesis test? what are the two decisions that you can make from performing a hypothesis test? select all that apply
When conducting a hypothesis test there are two possible decisions that you can make: reject the null hypothesis or fail to reject the null hypothesis.
A statistical hypothesis test is a method of statistical inference used to decide whether the data at hand sufficiently support a particular hypothesis. Hypothesis testing allows us to make probabilistic statements about population parameters.
When conducting a hypothesis test there are two possible decisions: reject the null hypothesis or fail to reject the null hypothesis. You should remember though, hypothesis testing uses data from a sample to make an inference about a population. When conducting a hypothesis test we do not know the population parameters. In most cases, we don't know if our inference is correct or incorrect.
When we reject the null hypothesis there are two possibilities. There could really be a difference in the population, in which case we made a correct decision. Or, it is possible that there is not a difference in the population (i.e., is true) but our sample was different from the hypothesized value due to random sampling variation. In that case we made an error. This is known as a Type I error.
When we fail to reject the null hypothesis there are also two possibilities. If the null hypothesis is really true, and there is not a difference in the population, then we made the correct decision. If there is a difference in the population, and we failed to reject it, then we made a Type II error.
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Glycerin at a temperature of 30 degrees celcius flows at a rate of 8×10−6m3/s through a horizontal tube with a 30mm diameter. what is the pressure drop in pascals per 100m?
The pressure drop in pascal is 3.824*10^4 Pascals.
To find the answer, we need to know about the Poiseuille's formula.
How to find the pressure drop in pascal?We have the Poiseuille's formula,[tex]Q=\frac{\pi Pr^4}{8\beta l}[/tex]
where, Q is the rate of flow, P is the pressure drop, r is the radius of the pipe, [tex]\beta[/tex] is the coefficient of viscosity (0.95Pas-s for Glycerin) and l being the length of the tube.
It is given that,[tex]Q=8*10^{-6}m^3/s\\diameter=30mm, thus,\\r=15mm\\l=100m\\\beta =0.95[/tex]
Thus, the pressure drop will be,[tex]P=\frac{8Q\beta l}{\pi r^4} =\frac{8*8*10^{-6}*0.95*100}{3.14*(15*10^{-3})^4} \\\\P=3.824*10^4Pascals.[/tex]
Thus, we can conclude that, the pressure drop in pascal is 3.824*10^4 Pascals.
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Consider a standing wave on a string. What is the distance between two adjacent nodes in terms of the wavelength λ of the standing wave?.
The distance between the two adjacent nodes = λ/2.
What is Wavelength?
A periodic wave's wavelength is its spatial period, or the length over which its form repeats. It is a property of both travelling waves and standing waves as well as other spatial wave patterns. It is the distance between two successive corresponding locations of the same phase on the wave, such as two nearby crests, troughs, or zero crossings. The spatial frequency is the reciprocal of wavelength. The Greek letter lambda (λ) is frequently used to represent wavelength. The term wavelength is also occasionally used to refer to modulated waves, their sinusoidal envelopes, or waves created by the interference of several sinusoids.
The distance between the two adjacent nodes = λ/2.
for the standing wave ,the distance between any two adjacent nodes or antinodes is 1/2 λ.
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What is the work generated by a healthy adult who circulates 9 l of blood through the brachial artery in 10 min?
120kJ work is generated by a healthy adult who circulates 9L of blood through the brachial artery in 10 min.
What is mean by work?Work is defined as the energy that is applied to or removed from an object by applying force along a displacement. It is frequently described in its most basic form as the result of force and displacement.Calculation of Work generatedA flow rate of 900 mL per minute is equal to a flow of 9 L in 10 minutes.
Additionally, you have 200W of total power generated.
9L Equals 9000 mL
900mL/min x 9,000mL/10min
By multiplying the power (watt) by the time, we can derive the work performed by the adult.
10 min = 600s
200W x 600s = 120 kJ
Hence, the work generated is 120kJ.
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Tyre pressure for car
Answer:
oxygen expanding unjhfyysue hjdbdhdjjhd
Answer:
32 psi to 35 psi.
Explanation:
Normal tire pressure is usually between 32~40 psi(pounds per square inch) when they are cold. So make sure you check your tire pressure after a long stay and usually, you can do it in the early morning.
A projectile is fired into the air at a 35o angle to the horizontal and an initial velocity of 120 m/s. what are the x and y components of the velocity vector?
Answer:
See below
Explanation:
X component = 120 * cos 35° = 98.298 m/s
Y component = 120 * sin 35° = 68.829 m/s
Any object launched into space with only gravity acting on it is referred to as a projectile. Gravity is the main force affecting a projectile. The x and y components of the velocity vector are 98.298 m/s and 68.829 m/s.
When a particle is thrown obliquely close to the Earth's surface, it travels along a curving route while experiencing constant acceleration. Always pointing in the direction of the Earth's center is this curving path. Such a particle's motion is referred to as projectile motion, and its trajectory is known as the projectile's trajectory.
The components of the projectile are:
X component = 120 × cos 35° = 98.298 m/s
Y component = 120 × sin 35° = 68.829 m/s
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why is black the good absorber of radiation?
Answer:
=> Black colour do not reflect the wavelength of light and is a good emitter of heat . This, black is a good absorber of radiation.
Answer:
Black coloured objects absorb all the wavelengths of light and do not reflect any of them. Therefore, it looks black in colour and is considered to be a good absorber and a good emitter of heat. On the other hand, white coloured objects reflect all the light that falls into it and therefore they look white
What function does the prism or diffraction grating perform in a spectrophotometer?
In a spectrophotometer, a prism or diffraction grating separates light into its constituent wavelengths.
To find the answer, we need to know more about the spectrometer.
What is spectrometer?A spectrometer measures the light refracted by the optical component into its various colors (wavelengths).prism is a dispersive component The dispersion happens because the angle of refraction is influenced by the material's refractive index, which is marginally influenced by the wavelength of light passing through the prism.An optical component called a diffraction grating splits (disperses) polychromatic light into its individual wavelengths (colors). Each wavelength of the polychromatic light that strikes the grating is scattered, reflecting from it at a slightly different angle.Thus, we can conclude that, In a spectrophotometer, a prism or diffraction grating separates light into its constituent wavelengths.
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hello friends,i need your help my home work now in physics,topic:motion.40 marks +brainliest if correct .
Answer:
See below
Explanation:
Vertical position is given by
df = do + vo t - 1/2 a t^2 df = final position = 0 (on the ground)
do =original position = 2 m
vo = original VERTICAL velocity = 0
a = acceleration of gravity = 9.81 m/s^2
THIS BECOMES
0 = 2 + 0 * t - 1/2 ( 9.81)t^2
to show t = .639 seconds to hit the ground
During this .639 seconds it flies horizontally at 10 m/s for a distance of
10 m/s * .639 s = 6.39 m
What is the horsepower of a 1,500 kg car that can go to the top of a 360 m high hill in exactly 1 min?
Answer:
W = m g h work that must be done on car
P = W / t power that must be input (in Watts)
P = m g h / t = 1500 kg * 9.8 m/s^2 * 360 m / 60 sec
P = 88,200 watts
P = 88,200 watts / 746 watts / hp = 118 hp
The horsepower of a 1,500 kg car that can go to the top of a 360 m high hill in exactly 1 min is 118.23 hp.
To find the power, the given values are,
Mass m = 1500 kg
Height h = 360 m
Time t = 1 minute = 60 seconds
g = 9.8 m/s
What is Power?Power is the amount of work that is done per unit of time. It can be associated with the speed of a change of energy within a system, or the time it takes to perform a job.
There are different types of power,
Mechanical power: is that work performed by an individual or a machine in a certain period of time.Electric power: which is the result of the multiplication of the potential difference between the ends of a load and the current flowing there.Formula for Power is,
Power = mgh/t
Power = (1500 x 9.8 x 360)/60
Power = 8.8 x 10⁴ watts
Recall
746watts = 1hp
8 x 10⁴ watts = 8 x 10⁴ / 746
Power = 118.23 hp
Thus, Power was calculated as 118.23 hp.
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What is the length of a box in which the minimum energy of an electron is 1. 1×10^−18 j ?
The length of a box in which the minimum energy of an electron is 1. 1×[tex]10^{-18}[/tex] j will be 74 * [tex]10^{-10}[/tex] m
Energy levels (also called electron shells) are fixed distances from the nucleus of an atom where electrons may be found. As you go farther from the nucleus, electrons at higher energy levels have more energy
Energy levels (also called electron shells) are fixed distances from the nucleus of an atom where electrons may be found. Electrons are tiny, negatively charged particles in an atom that move around the positive nucleus at the center. Energy levels are a little like the steps of a staircase.
One electron volt is the energy that an electron gains when it travels through a potential difference of one volt (1 eV = 1.6 x 10-19 Joules). Electrons in a hydrogen atom must be in one of the allowed energy levels. If an electron is in the first energy level, it must have exactly -13.6 eV of energy.
Energy of an electron in nth shell can be calculated as
E (n) = [tex]\frac{n^{2} h^{2} }{8ml^{2} }[/tex]
energy will be minimum in 1st shell
putting n=1
E (n) = [tex](1)^{2}[/tex] * [tex](6.63 * 10^{-34}) ^{2}[/tex] / 8 * 9.1 * [tex]10^{-31}[/tex] * [tex]l^{2}[/tex]
1.1 * [tex]10^{-18}[/tex] = [tex](1)^{2}[/tex] * [tex](6.63 * 10^{-34}) ^{2}[/tex] / 8 * 9.1 * [tex]10^{-31}[/tex] * [tex]l^{2}[/tex]
length(l) = 74 * [tex]10^{-10}[/tex] m
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Using the rydberg constant determined in question 1, calculate the shortest wavelength in the paschen series
The shortest wavelength in the paschen series= [tex]8.2\times 10^{-7}[/tex] m.
How do we calculate the shortest wavelength in the paschen series?Emission lines for hydrogen occur when electrons drop from some energy level to a lower energy level. To calculate the shortest wavelength in the paschen series we are using the formula,
[tex]\frac{1}{\lambda} =R_{H} (\frac{1}{n_{f}^{2} }-\frac{1}{n^{2} } )[/tex]
Here, we are given,
[tex]R_{H}[/tex]= Rydberg constant=[tex]1.09737 \times 10^{7} m^{-1}[/tex]
[tex]n_f[/tex]= The lower energy level quantum number.=3 (for the paschen series).
n= The quantum number of whichever state the transitions occur from = (for this case of the paschen series).
We have to find the wavelength associated with the photon emitted = [tex]\lambda[/tex] m.
Now we substitute the known values in the above equation, we can find that,
[tex]\frac{1}{\lambda} =1.09737 \times 10^{7} (\frac{1}{3^2 }-\frac{1}{\infty^{2} } )[/tex]
Or,[tex]\frac{1}{\lambda} =1.09737 \times 10^{7}\times \frac{1}{9 }[/tex]
Or,[tex]\frac{1}{\lambda} =1,219,300[/tex]
Or,[tex]\lambda= 8.2\times 10^{-7}[/tex] m
From the above calculation we can conclude that the shortest wavelength in the paschen series is [tex]8.2\times 10^{-7}[/tex] m
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If 30 j of magnetic potential energy is stored in a 6. 0-h inductor, what is the current in the inductor?
Current in the inductor, I = 100A
Given,
Magnetic potential energy stored, U= 30 joule
Inductance, L = 6.0 H
Therefore, current in the inductor, [tex]I^{2}[/tex]= (2×30×10^3) ÷ 6
= 2×5×10^3
= 10×10^3
[tex]I^{2}[/tex] = 10000
I = √10000
I = 100A
Concept:-
As a result of the magnetic forces that magnets exert on one another, magnetic potential energy is the energy that is stored in a system of magnets.Magnetic potential energy stored in an inductor, U = 1/2 (L[tex]I^{2}[/tex])L is the inductance of the inductor.I is the current flowing through the inductor.Learn more about Current here: https://brainly.com/question/17403680
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The algol binary system consists of a b main-sequence star with a mass of 3.7 m? and a k subgiant star with a mass of 0.81 m?. why, at first, did this puzzle astronomers?
The lower-mass star should have developed into a giant star.
What is Algo Binary System?Algol variables, also known as Algol-type binaries, are a subclass of eclipsing binary stars that resemble Persei, the class's prototype star (Beta Persei, Algol). An Algol binary is a system in which both stars are almost spherical, making it possible to precisely predict when the eclipses would begin and conclude. Usually, the primary is a main-sequence star that is located close to its Roche lobe. The secondary star might be either an evolved star occupying its Roche lobe, known as a semidetached binary, or it could be a main sequence star, known as a detached binary.
eclipsing variable stars-
One of the most well-known variable stars in the sky, Algol serves as the model for the Algol variables class of eclipsing variable stars. A B-class main sequence star, an orange subgiant, and a faint A-class star make up the triple star system known as Beta Persei Aa1, Aa2, and Ab.
The lower-mass star should have developed into a giant star first, followed by the higher-mass B main-sequence star.
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Stellar nurseries, such as the orion nebula, contain hundreds or more fragmenting and contracting regions, as well as many protostars and stars. What condition would allow a protostar to become a stable star?.
The hydrogen fusion process will begin after the protostar reaches a temperature of 10 million degrees kelvin, and it will then turn into a stable star.
How does a protostar become a stable star?The interstellar medium can sometimes be gathered into a large nebula, which is a cloud of gas and dust. A nebula can span a number of light years. These nebulae are where gas and dust can combine to produce stars. Until a star can combine hydrogen into helium, it cannot be considered a star. They are referred to as protostars before then. As gravity starts to gather the gases into a ball, a protostar is created. Accrution is the term for this procedure.
Gravitational energy starts to heat the gasses as gravity draws them into the ball's core, which causes the gasses to radiate radiation. Radiation initially just dissipates into space. However, much of the radiation is retained inside the protostar as it draws in stuff and becomes denser, which causes the protostar to heat up even more quickly.
The hydrogen fusion process will begin after the protostar reaches a temperature of 10 million degrees kelvin, and it will then turn into a star.
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An electric device delivers a current of 5. 0 a for 10 seconds. how many electrons flow through this device?
An electric device delivers a current of 5.0 A for 10 seconds then the number of electrons flowing through this device would be 3.125ₓ10²⁰
What is an electric charge?Charged material experiences a force when it is exposed to an electromagnetic field due to the physical property of electric charge. You can have a positive or negative electric charge (commonly carried by protons and electrons respectively). Unlike charges attract one another while like charges repel one another. We refer to an object as neutral if it has no net charge.
Electric current is defined as the charge per unit of time.
The mathematical relation between current and the electric charge
I =Q/T
where I is the current flowing
Q is the total electric charge
T is the time period for which the current is flowing
By using the above relation between electric current and electric charge
I =Q/T
By substituting the values of current and time
5 =Q/10
Q= 50 Coulomb
The charge on one electron is -1.6 ×10⁻¹⁹ coulomb.
The number of electrons = Total charge /charge on the one electron
=50/1.6×10⁻¹⁹
=3.125ₓ10²⁰
Thus, the total number of electrons flowing through the device would be 3.125ₓ10²⁰.
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The development of fusion energy has not been successful so far because of the high temperatures needed for fusion to occur. It’s not clear when we will have the technology to accomplish this. Do you think the government should continue to fund fusion research? Give your reasons.
Government should continue to fund fusion energy research because:
it potentially will produce large amounts of energyscientific research could discover more feasible methods of fusion energy productionit is a very clean form of energyWhat is fusion energy?Fusion energy is the energy produced from fusion reactions.
Fusion reactions are a type of nuclear reaction in which small atomic nucleus are fused together to produce larger atomic nucleus with the release of large amounts of energy.
The Sun produces its energy from fusion reactions between hydrogen atoms to produce helium nucleus. This reaction takes place at very high temperatures.
It is important that the government continue to fund fusion energy research because:
it potentially will produce large amounts of energymore scientific research could discover alternative cheaper methods of fusion it is a very clean form of energyIn conclusion, the continuous government funding will make it possible to finally discover cheaper and more feasible ways to produce fusion energy.
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Compare two separate regions of space. the electrical potential energy is the same in both regions. if the amount of charge in one region is larger, then potential in that region must be:_________
Compare two separate regions of space. the electrical potential energy is the same in both regions. if the amount of charge in one region is larger, then potential in that region must be smaller.
The basic difference between electric potential and electric potential energy is that Electric potential at a point in an electric field is the amount of work done to bring the unit positive charge from infinity to that point, while electric potential energy is the energy that is needed to move a charge against the electric field.
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The critical path is the sequence of activities that determine the latest date by which the project can be evaluated.
a. true
b. false
The statement given about the critical path is true.
To find the answer, we have to know more about the critical path.
What is critical path?The longest series of tasks in a project plan that must be finished on time for it to be finished by the deadline is known as the critical path. The critical route is the set of actions that, when carried out in a timely manner while taking into account all the aforementioned factors, will take the longest to accomplish the project. Because it is the "red alert" of paths, the critical path is referred to as "critical". Your project won't be successfully completed before the deadline if it doesn't follow the critical path's timing and order.Thus, we can conclude that, the statement given about the critical path is true.
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Consider light energy that is momentarily absorbed in glass and then re-emitted. Compared to the absorbed light, the frequency of the re-emitted light is?
The frequency of the re-emitted light is identical to that of the absorbed light.
To find the answer, we need to know more about the frequency of light.
Why the re-emitted light has the same frequency?The wavelength of the light that is momentarily absorbed in glass and then re-emitted is the same, which explains why the re-emitted light has the same frequency as the absorbed light and the frequency of the absorbed light is the same. An electromagnetic wave's energy is inversely related to its frequency. The relationship between the wave's wavelength and frequency depends on the speed of light:[tex]frequency=\frac{c}{wave length}[/tex] , c is the speed of light.
Despite not having mass, light still has energy, and that energy is conserved. As a result, in order for there to be energy conservation, the energy of the light that is received and reemitted must be equal.Thus, we can conclude that, the re-emitted light's frequency matches the absorbed light's frequency.
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