A ray reflected successively from two plane mirrors inclined at a certain angle undergoes a deviation of 300 ∘ . The number of images observable are Options: A . &nbsp10 B . &nbsp11 C . &nbsp12 D . &nbsp13

Answer: Option B : B By using δ = ( 360 − 2 θ ) ⇒ 300 = 360 − 2 θ ⇒ θ = 30 ∘ .Hence number of images = 360 30 − 1 = 11

A ray reflected successively from two plane mirrors inclined at a certain angle

Question

A ray reflected successively from two plane mirrors inclined at a certain angle undergoes a deviation of

300^{\circ}

. The number of images observable are

Options:

A . 10

B . 11

C . 12

D . 13

Answer: Option B
:
B
By using

δ = (360 - 2 θ) \Rightarrow 300 = 360 - 2 θ

\Rightarrow θ = 30^{\circ}

.Hence number of images =

\frac{360}{30} - 1 = 11

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