Find the angle of minimum deviation for an equilateral prism made of a material of refractive index 1.732. What is the angle of incidence for this deviation?

Refractive index of prism =


Angle of minimum deviation is given by =


34.PNG


A= angle of prism


Is the minimum deviation


× =


⇒


⇒


⇒


⇒


⇒


⇒


⇒


⇒


⇒


⇒ So, the minimum angle of deviation is and the required angle of incidence =.


1