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A ray of light travels from an opticaly ...

A ray of light travels from an opticaly denser to a rarer medium. The critical angle for the two media is c. the maximum possible deviation of the ray will be

A

`2c`

B

`pi/2-c`

C

`pi-c`

D

`pi-2c`

Text Solution

Verified by Experts

The correct Answer is:
B
In the limiting case, `vec(AB)` will be the refracted ray which grazes along the surface AB corresponding to the incident ray OA. Therefore,here, angle of incidence=c (critical angle) and angle of refraction=`pi//2`
`therefore`Angle of deviation`=delta_(max)=(pi)/(2)-c`.
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Knowledge Check

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