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According to particle theory of light wh...

According to particle theory of light what is the velocity of light in a dense medium, compared to that in rare medium ?

A

more in rarer medium and less in denser

B

less in rarer medium and more in denser

C

same in both medium

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • A: Particle theory fails to explain the velocity of light in air and water. R: According to particle theory, light in a dense medium is moving faster than in rare medium.

    A
    Both assertion and reason are true and the reason is correct explanation of the assertion.
    B
    Both assertion and reason are true but reason is not correct explanation of the assertion.
    C
    Assertion is true but the reason is false.
    D
    Both assertion and reason are false

  • The velocity of light in vacuum can be changed by changing ......

    A
    amplitude
    B
    frequency
    C
    wavelength
    D
    medium

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    The speed of light decreases as it passes from an optically denser medium to an optically rarer medium.

    Why charged particle attracts light particles ?

    What is the effect on the speed and wavelength of light when the light wave refracted from denser medium to rarer medium ?

    The optical properties of a medium are governed by the relative permitivity (epsi_(r)) and relative permeability (mu_(r)) . The refractive index is defined as sqrt(mu_(r)epsi_(r))=n . For ordinary material epsi_(r)gt0 and mu_(r)gt0 and the positive sign is taken for the square root. In 1964, a Russian scientist V. Veselago postulated the existence of material with epsi_(r)lt0andmu_(r)lt0 . Since then such 'metamaterials' have been produced in the laboratories and their optical properties studied. For such materials n=-sqrt(mu_(r)epsi_(r)) . As light enters a medium of such refractive index the phases travel away from the direction of propagation. (i) According to the description above show that if rays of light enter such a medium from air (refractive index = 1) at an angle theta in 2^(nd) quadrant, then the refracted beam is in the 3^(rd) quadrant. (ii) Prove that Snell's law holds for such a medium.

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