Question

A ray of light incident on face ab of an equilateral glass prism shows minimum deviation of 30 degree calculate the speed of light through the prism

Answer 1

Answer:

sin I/sin r= ¶

sin I/ sin 30 = ¶

2sin I=¶

hence,

3×10^8 /x =¶

by basic unitary method x=1.5×10^8