Q. 24.6( 7 Votes )

Determine the angle of incidence of a ray of light, if the reflected ray is at an angle of 90° to the incident ray?

Answer :

According to the law of reflection

The angle of incidence = Angle of reflection


Let’s draw the figure -


9Capture.png


According to question reflected ray is making an angle of 900 with the incident ray.


So angle of incidence + angle of reflected = 900


Since both angle of incidence is equal to angle of reflected


Angle of incidence + angle of incidence = 900


Angle of incidence = 450


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