Two plane mirrors $M_{1}$ and $M_{2}$ are inclined at angle as shown in fig. A ray of light $1$ , which is parallel $M_{1}$ , strikes $M_{2}$ and after two reflections, ray 2 becomes parallel to $M_{2}$ Find the angle $θ$

30

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45

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60

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37

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Solution

The correct option is C $60$
Different angles are as shown in fig $.$ in triangle $A B C,$
$\begin{matrix} θ + θ + θ = 180^{0} 3 θ = 180^{0} θ = 60^{0} \end{matrix}$
Hence,
option $(C)$ is correct answer.

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