JEE MainPhysicsGeometrical OpticsNumerical+4 / −1
A light ray is incident, at an incident angle 1, on the system of tow plane mirrors M1 and M2 having an inclination angle 75 between them (as shown in figure). After reflecting from mirror M1 it gets reflected back by the mirror M2 with an angle of reflection 30 . The total deviation of the ray will be degree. 

Numerical answer
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