Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
0 votes

Two plane mirrors are inclined to each other in such a way that a ray of light moving parallel to one mirror comes out parallel to the other mirror after two reflections. The angle between the mirrors is :

$(a)\;30^{\circ} \\ (b)\;45^{\circ} \\ (c)\;90^{\circ} \\ (d)\;60^{\circ} $

Can you answer this question?

1 Answer

0 votes
Since $N_1$ is normal to mirror $M_1$
angle of incidence = angle of reflection
and $AB$ || on mirror $M_2$
$\angle ABM_1 =\angle CBO= \theta$
Similarly $N_2$ is normal to mirror $M_2$
$\angle M_2 CE =\angle CB0 =\theta$
In $\Delta OCB; $
$3 \theta= 180^{\circ}$
$\theta =60^{\circ}$
Hence d is the correct answer.
answered Jan 15, 2014 by meena.p

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App