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As shown, a narrow beam of light is inci...

As shown, a narrow beam of light is incident onto a semi-circular glass cylinder of radius R. Light can exit the cylinder when the beam is at the centre. When the beam is moved parallel to a maximum distance d from the central line, no light can exit the cylinder from its lower surface. Find the refractive index of the glass.

A

`(R)/(d)`

B

`(d)/(R)`

C

`(R)/(sqrt(R^(2)-d^(2)))`

D

`(sqrt(R^(2)-d^(2)))/(R)`

Text Solution

Verified by Experts

The correct Answer is:
A
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