Determine the angle of incidence of a ray of light, if the reflected ray is at an angle of 90° to the incident ray?
According to the law of reflection
The angle of incidence = Angle of reflection
Let’s draw the figure -
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