Question

5. The incident ray makes an angle of 90° with the surface. Find the angle of reflection
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Answer 1

Answer:

the angle of reflection is 90 degree

Explanation:

because angle of incidence is equal to angle of reflection

Answer 2

Answer:

the wave is incident at 90, it is travelling parallel to the interface. The easy answer is that since the angle of reflection equals angle of incidence, the reflected ray will also be at 90. The longer answer is that 90 is an unrealistic angle of incidence because it is exactly parallel to the mirror.