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A light wave travels through three trans...


A light wave travels through three transparent materials of equal thickness rank in order from the highest to lowest the indices of refraction `n_(1),n_(2)` and `n_(3)`.

A

`n_(3)gtn_(1)gtn_(2)`

B

`n_(1)ltn_(3)ltn_(2)`

C

`n_(3)ltn_(1)ltn_(2)`

D

`n_(2)gtn_(3)gtn_(1)`

Text Solution

Verified by Experts

The correct Answer is:
A
`nprop(1)/(lamda)`
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Knowledge Check

  • A beam of light passes from medium 1 to medium 2 to medium 3 as shown figure. What may be concluded about the three indices of refraction, n_(1),n_(2),and n_(3) ?

    A
    `n_(3)gtn_(1)gtn_(2)`
    B
    `n_(1)gtn_(3)gtn_(2)`
    C
    `n_(2)gtn_(3)gtn_(1)`
    D
    `n_(2)gtn_(1)gtn_(3)`

  • Light traveling trhought three transparent substances follows the path shown in figure. Arrange the indices of refraction in order from smallest to largest. Not the total internal reflection does occur on the bottom surface of medium 2.

    A
    `n_(1) lt n_(2) lt n_(3)`
    B
    `n_(2) lt n_(1) lt n_(3)`
    C
    `n_(1) lt n_(3) lt n_(2)`
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    `n_(3) lt n_(1) lt n_(2)`

  • Two waves of light in air have the same wavelength and are intially in phase. They then travel through plastic layers with thickness of L_(1) = 3.5 mm and L_(2) = 5.0 mm and indices of refraction n_(1) = 1.7 and n_(2) = 1.25 as shown in figure. The rays later arrive at a common point. The longest wavelength of light for which constructive interference occurs at the point is

    A
    `0.8 mu m`
    B
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    C
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