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When light travels from a rarer to dense...

When light travels from a rarer to denser medium, it loses some speed. Does the reduction in speed imply a reduction in the energy carried by the light wave ?

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Descending order of wavelength the following electromagnetic waves :
Radio waves , Infrared light , Blue light , X-rays .
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Explore conceptually related problems

(a) When monochromatic light is incident on a surface separating two media, the reflected and refracted ligth both have the same frequency as the incident frequency. Explain why ? (b) When light travels from a rarer to a denser medium, it loses speed. Does the reduction in speed imply a reduction in energy carried by the light wave ? ( c) In the wave picture of light, intensity of ligth is determined by the square of amplitude of wave. What determines the intensity of light in teh photon picture of light ? (NCERT Solved Example)

Explain the following giving reasons: (a) When monochromatic light is incident on a surface separating two media, the reflected and refracted light both have the same frequency as the incident frequency. Explain why. (b) When light travels from a rarer to a denser medium, the speed decreases. does the reduction in speed imply a reduction in the energy carried bythe light wave ? (c) In the wave picture of light, intensity of light is determined by the square of the amplitude of the wave, what determines the intensity of light in the photon pisture of light ?

Knowledge Check

  • Assertion: When a light wave travels from a rarer to a denser medium, it loses speed. The reduction in speed imply a reduction in energy carried by the light wave. Reason: The energy of a wave is proportional to velocity of wave.

    A
    (a) If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    (b) If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    (c) If assertion is true but reason is false.
    D
    (d) If assertion and reason both are false.

  • A: When light travels from a rarer to a denser medium, it loses some speed but it doesn't imply a reduction in the energy carried by the light wave. R: Energy carried by a wave depends on the amplitude of the wave and not on the speed of wave propagation.

    A
    IF both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
    B
    If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark(2)
    C
    IF Assertion is true statement but Reason is false then mark(3)
    D
    If both Assertion and Reason are false statements, then mark (4)

  • When light travels from a rarer medium to a denser medium, it ________

    A
    speed remains the same
    B
    speeds down then up
    C
    speeds down
    D
    speeds up

    • Similar Questions

    Explore conceptually related problems

    (a) When monochromatic light is incident on a surface separating two media, the reflected and refracted light both have the same frequency as the incident frequency. Explain why ? (bb) When light travels from a rarer to a denser medium, the speed decreases. Does the reduction in speed imply a reduction in the energy carried by the light wave? c) In the wave picture of light, intensity of light is determined by the square of the amplitude of the wave. What determines the intensity of light in the photon picture of light.

    When light travels from a rares to a denser medium, the speed of light decreases. Does the reduction in speed imply a reduction in the energy ?

    When light travels from a rarer to a denser medium, the speed decreases. Does this decrease in speed imply a decrease in the energy carried by the light wave ? Justify your answer.

    Assertion (A): When a light wave travels from rarer to denser medium, its speed decreases. Due to this reduction of speed the energy carried by the light wave reduces. Reason (R): Energy of wave is proportional to the frequency.

    When a wave travels from a denser to rarer medium, then

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