Question

A ray of monochromatic light suffers minimum deviation of `38^(@)` while passing through a prism of refracting angle `60^(@)` . Refracting index of the prism material is
A. `1.5`
B. `1.3`
C. `0.8`
D. `2.4`

Answer 1

Correct Answer - A
`mu=(sin.(A+delta_(m))/(2))/(sin.(A)/(2))=(sin.(60+38)/(2))/(sin.(60)/(2))`
`=(sin 49^(@))/(sin30^(@))=(0.7547)/(0.5)=1.5`