6. The angle of incidence at a plane surface is 30° then what is the angle or reflection?
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Glancing angle of incidence is defined as the angle between the incident ray and the reflecting surface.
Hence, angle of incidence + glancing angle of incidence = 90
0
So, angle of incidence =90
0
− glancing angle of incidence =90
0
−30
0
=60
0
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Answer:
as we know that from the law of plane mirror that angle of incidence = to angle of reflection
hence,
angle of reflection is 30°
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