Computer Applications
A ray is incident on a plane mirror. It's reflected ray is perpendicular to the incident ray. Find the angle of incidence.
Reflection of Light
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Answer
According to the law of reflection,
angle of incidence = angle of reflection
i.e., i = r
Given,
Reflected ray is perpendicular to incident ray
Hence,
i + r = 90°
Using above law, we get,
i + i = 90°
2i = 90°
Hence,
i = r = 45°
Therefore, angle of incidence = 45°
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