Question

A light ray is incident by grazing one of the face of a prism and after refraction ray does not emerge out, what should be the angle of prism while critical angle is $C$

• A. Equal to $2C$
• B. Less than $2C$
• C. More than $2C$
• D. None of the above

Answer 1

The correct option is C More than $2C$

From ray diagram
$A=C+\theta$ for $TIR$ at $AC$
$\theta >C$ so $A>2C$