A ray of mono - chromatic light is incident at the angle theta_i on refracting face of a prism of apex angle 75^@. After refraction though prism it is incident on 2nd refracting surface, such that it grazes the surface. Refractive index of material of prism is sqrt2 . If critical angle of material of prism is theta_c. Then find the ratio (theta_i)/(theta_c)

A ray of mono - chromatic light is incident at the angle theta_i on re

1.	A ray of mono - chromatic light is incident at the angle theta_i on refracting face of a prism of apex angle 75^@. After refraction though prism it is incident on 2nd refracting surface, such that it grazes the surface. Refractive index of material of prism is sqrt2 . If critical angle of material of prism is theta_c. Then find the ratio (theta_i)/(theta_c)
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