Questions  

Two plane mirrors are inclined to each other at an angle θ. A ray of light is incident an one mirror and after two successive reflections, the final reflected ray becomes parallel to the incident ray. Then the value of θ is

Unlock the full solution & master the concept.

Get a detailed solution and exclusive access to our masterclass to ensure you never miss a concept
By Expert Faculty of Sri Chaitanya
a
Any angle
b
90o
c
45o
d
60o
NEW

Ready to Test Your Skills?

Check Your Performance Today with our Free Mock Tests used by Toppers!

detailed solution

Correct option is B

∠ABO=π−α+θ∠RBO=π−α+θAlso, by law of reflection, ∠PBM2=∠ABO=π−α+θSince PB and QA are parallel, ∠QAB=∠PBR⇒π−2α=2π−α+θ⇒θ=90o

prepare smarter

with latest test series, free mock tests, and classes
NEET AITSIIT JEE AITSLive ClassFree Mocks

ctaimg

Similar Questions

A plane mirror is lying in xy-plane with its reflecting surface facing positive z-axis. A particle is moving towards the reflecting surface of the mirror with velocity 2i^2j^3k^m/s. If the mirror starts moving with velocity 2k^m/s, velocity of the image of the particle relative to the mirror is 

Want to Improve your productivity
talk to our academic experts now !!

counselling
india
+91

whats app icon