Question 261: Ray Optics

Question

A light ray is incident, at an incident angle $$	heta$$
1
, on the system of tow plane mirrors M
1
and M
2
having an inclination angle 75$$^\circ$$ between them (as shown in figure). After reflecting from mirror M
1
it gets reflected back by the mirror M
2
with an angle of reflection 30$$^\circ$$. The total deviation of the ray will be _____________ degree.

Accepted Answer

On first reflection angel of deviation is 90ÃÂ° and on
second reflection angle of deviation is 120ÃÂ°
So total deviation is $$\delta $$ = 90ÃÂ° +120ÃÂ° = 210ÃÂ°

Ray Optics

Integer / Numeric Answer Type