Physics

Physics

Problem

Two plane mirrors

M_1

and

M_2

meet at an angle

\theta

. A light ray strikes

M_1

at an angle of

35^{\circ}

to its normal, reflects to

M_2

, and finally emerges making an angle of

145^{\circ}

with its original direction. Calculate the angle

\theta

between the two mirrors. a)

75^{\circ}

b)

52.5^{\circ}

c)

72.5^{\circ}

d)

37.5^{\circ}

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