Question

The angle of incidence at a plane surface is 30° then what is the angle or reflection?​

Answer 1

Step-by-step explanation:

the angle of reflection will be 150°

Answer 2

According to first law of reflection incident and reflected angles are equal. So, reflected angle will be 30 degrees. Reflected angle and angle B together make up the angle between normal and the surface that is 90 degrees. So, Angle b = (90 - reflected angle), which is (90-30) = 60 degree.

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