A ray of light incidents on a plane mirror at an angle of 900 to its surface. What will be the angle of reflection
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The angle of reflection is equal to the angle of incidence, therefore, when a ray strikes the mirror at 90 degrees, the ray reflects back in the opposite direction on the same path, that is at 90 degrees.
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The second law of reflection states that the angle of incidence is always equal to the angle of reflection. ... If the angle of incidence is 90°, then the angle of reflection will also be 90°. Or, we can also say that the reflected ray will just retrace its path
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