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- 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)
As we learn
Rotation of Mirror -
Keeping the incidence ray fixed, When mirror is rotated by an angle , the reflected ray is rotated by an angle
.
- wherein
If the mirror is rotated by angle then the reflected ray rotates by
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.
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