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A glass slab ABCD is made of two differe...

A glass slab ABCD is made of two different grades of glass of refractive indices `3/2 and 4/3` of equal thickness, and a ray PQ is incident on the face AB. Trace the ray as it passes through the slab and find the angle of emergence and the angle of deviation, Find the effective refractive index of the slab.

Text Solution

Verified by Experts

(i) Apparent shift ` = t(1-1/mu)`
Find the apparent shift in each glass slab `S_(1) and S_(2)` and the total shift (S) = `S_(1) + S_(2)`
But `S = t(1-1/mu_(e))` when `mu_(e)` is the effective refractive index
(ii) `mu = 24/17`
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Knowledge Check

  • A ray of light is incident on a glass slab making an angle of 30^@ with the surface. The angle of refraction in glass, if the refractive index of flass is 1.6 , is

    A
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    B
    `33^@`
    C
    `12^@`
    D
    `15^@`

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