Computer Applications
The figure given below shows an incident ray AO and the normal ON on a plane mirror. The angle which the incident ray AO makes with the mirror is 30°.
(a) Find the angle of incidence.
(b) Draw the reflected ray and then find the angle between the incident and reflected rays.
Reflection of Light
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Answer
(a) The angle of incidence = 90° - 30° = 60°
(b) Diagram showing the reflected ray is given below:
The angle between the incident ray and the reflected ray = angle of incidence + angle of reflection
As we know,
Angle of incidence = Angle of reflection = 60°
Therefore, we get,
60° + 60° = 120°
Hence, the angle between the incident ray and reflected ray = 120°
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