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Problem
Problem
Two plane mirrors are inclined at
70
∘
70^\circ
7
0
∘
. A ray incident on one mirror at incidence angle
θ
\theta
θ
, after reflection falls on the second mirror and is reflected from there parallel to the first mirror. The value of
θ
\theta
θ
is a.
50
∘
50^\circ
5
0
∘
b.
45
∘
45^\circ
4
5
∘
c.
30
∘
30^\circ
3
0
∘
d.
25
∘
25^\circ
2
5
∘
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