A glass prism of angle 60° has an angle of minimum deviation of 30° for a given colour of light. The refractive index of glass for that colour of light is :
Answer & explanation
Correct answer: option 1
$ \mu = \frac{sin(\frac{A+\delta_m}{2})}{sin\frac{A}{2}} = \frac{sin45^o}{sin30^o}=\sqrt{2}=1.414$