Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • A ray of light travels from a light sources to an observer after reflection on from a plane mirror. If the light source rotates clockwise direction by 100 , by what angle and in wha

A ray of light travels from a light sources to an observer after reflection on from a plane mirror. If the light source rotates clockwise direction by 100 , by what angle and in what direction must the mirror be roteted so that the light ray still strive the observer?

Option: 1

50 clockwise


Option: 2

50 Anticlockwise


Option: 3

100 clockwise


Option: 4

100 Anticlockwise


Answers (1)

best_answer

As we learn

Rotation of Mirror -

Keeping the incidence ray fixed, When mirror is rotated by an angle \theta, the reflected ray is rotated by an angle 2\theta.

- wherein

 

 

 

If the mirror is rotated by angle \Theta then the reflected ray rotates by 2\Theta in the same sense. Due to the source of light rotation reflected lights rotates by 10 in anticlockwise direction. Hence to balance this the mirror should be rotated by 50 in clock wise dierction.

 

Posted by

Anam Khan

View full answer

Similar Questions