Physics

Problem

Plane mirrors

M_{1}

and

M_{2}

form an angle of

70^{\circ}

with each other. A light ray strikes

M_{1}

making an angle of incidence of

35^{\circ}

with the normal, gets reflected to

M_{2}

and is then reflected once more. Determine the total deviation between the initial incident ray and the final reflected ray after the second reflection.

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