A ray of light is incident at an angle of on one face of a prism which has refracting angle of . The ray emerging out of the prism makes an angle of with the incident ray. If the refractive index of the material of the prism is , find the value of a |

A ray of light is incident at an angle of on one face of a prism which has refracting angle of . The ray emerging out of the prism makes an angle of with the incident ray. If the refractive index of the material of the prism is , find the value of a |

1 Answer

127 votes

**(3)**

Given and

We have

From Eq. (i), we get

or

So is also zero, then

So

Hence the value of

127 votes

127