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If the angle made by the incident ray with the surface of a plane mirror is 30⁰, the angle of reflection must be_____ option :- 1) 30⁰2) 90⁰3) 60⁰ |
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Answer» ong>ANSWER: 60° 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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