1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tatyana61 [14]
3 years ago
5

Consider light energy that is momentarily absorbed in glass and then re-emitted. Compared to the absorbed light, the frequency o

f the re-emitted light is
A) considerably less.
B) slightly less.
C) the same.
D) slightly more.
E) considerably more.
Physics
1 answer:
Ostrovityanka [42]3 years ago
4 0

Answer:

Compared to the absorbed light, the frequency of the re-emitted light is <em>the same</em>.

Explanation:

The reason to why the 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 <em>the same</em> is because the wavelength of the absorbed light and the re-emitted light is the same. The energy carried by an electromagnetic wave is proportional to the frequency of the wave. The wavelength and frequency of the wave are connected via the speed of light:

<em>c = fλ</em>

<em>where</em>

  • <em>c is the speed of light</em>
  • <em>f is the frequency of light </em>
  • <em>λ is the wavelength of the light</em>

Though light does not have mass, it does have energy and it's energy is conserved. Therefore, in the conservation of energy, the energy of the absorbed light must be equal to the re-emitted light. This is why the frequency of the re-emitted light is <em>the same</em> as the frequency of the absorbed light.

You might be interested in
How does the area of ​​0.3 m2 of iron change when heated from 20 ° C to 60 ° C?
DerKrebs [107]

Answer:

The quantitative relationship between heat transfer and temperature change contains all three factors: Q = mcΔT, where Q is the symbol for heat transfer, m is the mass of the substance, and ΔT is the change in temperature. The symbol c stands for specific heat and depends on the material and phase. The specific heat is the amount of heat necessary to change the temperature of 1.00 kg of mass by 1.00ºC. The specific heat c is a property of the substance; its SI unit is J/(kg ⋅ K) or J/(kg ⋅ ºC). Recall that the temperature change (ΔT) is the same in units of kelvin and degrees Celsius. If heat transfer is measured in kilocalories, then the unit of specific heat is kcal/(kg ⋅ ºC).

Explanation:

6 0
3 years ago
An LC circuit is built with a 20 mH inductor and an 8.0 PF capacitor. The capacitor voltage has its maximum value of 25 V at t =
Margaret [11]

Answer:

a) the required time is 0.6283 μs

b) the inductor current is 0.5 mA

Explanation:

Given the data in the question;

The capacitor voltage has its maximum value of 25 V at t = 0

i.e V_m = V₀ = 25 V

we determine the angular velocity;

ω = 1 / √( LC )

ω = 1 / √( ( 20 × 10⁻³ H ) × ( 8.0 × 10⁻¹² F) )

ω = 1 / √( 1.6 × 10⁻¹³  )

ω = 1 / 0.0000004

ω = 2.5 × 10⁶ s⁻¹

a) How much time does it take until the capacitor is fully discharged for the first time?

V_m =  V₀sin( ωt )

we substitute

25V =  25V × sin( 2.5 × 10⁶ s⁻¹ × t )

25V =  25V × sin( 2.5 × 10⁶ s⁻¹ × t )

divide both sides by 25 V

sin( 2.5 × 10⁶ × t ) = 1

( 2.5 × 10⁶ × t ) = π/2

t = 1.570796 / (2.5 × 10⁶)

t = 0.6283 × 10⁻⁶ s

t = 0.6283 μs

Therefore, the required time is 0.6283 μs

b) What is the inductor current at that time?

I(t) = V₀√(C/L) sin(ωt)

{ sin(ωt) = 1 )

I(t) = V₀√(C/L)

we substitute

I(t) = 25V × √( ( 8.0 × 10⁻¹² F ) / ( 20 × 10⁻³ H ) )

I(t) = 25 × 0.00002

I(t) = 0.0005 A

I(t) = 0.5 mA

Therefore, the inductor current is 0.5 mA

8 0
3 years ago
An electron (q=-1.602×10-19C) is placed .03m away from spherical object with a net charge of -7.2 C.
vovangra [49]

Answer:

Explanation:

electric field at the location of electron

= 9 x 10⁹ x 7.2 / .03²

= 72 x 10¹² N/C

force on electron = electric field x charge on electron

= 72 x 10¹² x 1.6 x 10⁻¹⁹

= 115.2 x 10⁻⁷ N .

C )

work done = charge on electron x potential difference at two points

potential at .03 m

= 9 x 10⁹ x 7.2 / .03

= 2.16 x 10¹² V

potential at .001 m

= 9 x 10⁹ x 7.2 / .001

= 64.8 x 10¹² V

potential difference = (64.8 - 2.16 )x 10¹² V

= 62.64 x 10¹² V  .

work done = 62.64 x 10¹² x 1.6 x 10⁻¹⁹

= 100.224 x 10⁻⁷ J .

D )

There will be no change in the magnitude of force on positron except that the direction of force will be reversed . In case of electron , there will be repulsion and in case of positron , there will be attraction .

Work done in case of electron will be positive and work done in case of positron will be negative .

electric field due to charge will be same in both the cases .

8 0
3 years ago
What force cause the rod to become charged
gtnhenbr [62]

Answer:

electricity

If a rod is charged it is because of the electrical force acting on it

6 0
3 years ago
Anyone know what type of circuit this is?
Oksana_A [137]

Answer:

C

Explanation:

BECAUSE ITS GOING ON AND ON IF ITS NOT CORRECT I WILL VOTE YOU BRAINLEST ON MY QUESTION

3 0
3 years ago
Other questions:
  • Mark and David are loading identical cement blocks onto David’s pickup truck. Mark lifts his block straight up from the ground t
    6·1 answer
  • An object is dropped from a platform 100 feet high. Ignoring wind resistance, what will its speed be when it reaches the ground?
    12·2 answers
  • How is our planets giant,thermohaline system of warm and cold water like a massive convection current
    5·1 answer
  • when you hold a warm bowl of soup the temperature of the palms of your hands increases this is an example of
    7·1 answer
  • If the CD rotates clockwise at 500 rpm (revolutions per minute) while the last song is playing, and then spins down to zero angu
    12·2 answers
  • The amount of a good or service a
    10·1 answer
  • A curved, transparent object used to refract light
    11·1 answer
  • Which of the following is a major reason for increased female participation in collegiate athletics?1. Title IX legislation2. mo
    6·1 answer
  • Find the volume of a rectangular prism that is 8m long, 4m wide, and 300cm high
    14·2 answers
  • If an earthquake wave having a wavelength of 13 km causes the ground to vibrate 10 times (1 point) each minute, what is the spee
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!