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A parallel beam of width 'a' is incident...

A parallel beam of width 'a' is incident on the surface of glass slab `(mu = 3//2)` at an angle 'I' and the angle of refraction in glass is 'r'. The width of the refracted parallel beam will be

A

equal to a

B

less than a

C

more than a

D

exactly 2a / 3

Text Solution

Verified by Experts

The correct Answer is:
C
`(W_(1))/(W_(r)) = (cos i)/(cos r)`
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