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When a wave undergoes reflection at a de...

When a wave undergoes reflection at a denser medium, what happens to its phase?

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When a wave undergoes a reflection at a denser medium then its rest reflected as through and vice versa. So its phase changes at `180^@` .
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Knowledge Check

  • When light travels from rarer to denser medium, the refracted ray is _______ the normal.

    A
    bent away
    B
    along
    C
    bent towards
    D
    just grazes the surface of separation.

  • When a wave goes from one medium to another , there is a change in ………. .

    A
    velocity
    B
    amplitude
    C
    wavelength
    D
    all the above

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    i. Light has several properties like reflection, refraction etc. When light travels from an optically denser medium to a rarer medium ? a. What happens to the light at the interface ? b. give a demonstration for total internal reflection. c. What are the technological applications of total internal reflection in nature? Briefly explain it.

    What is meant by rarer and denser medium?

    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 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 determine the intensity of light in the photon picture of light?

    TRUE or FALSE: When light rays travel rarer to denser medium, it bends towards the normal.

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