what will be the angle of incidence if a ray is reflected back at an angle of 30° ?
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The angle of incidence is always equals to the angle of reflection about the normal at a given plane ,thus the angle of reflection will also be 30 degress only......
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Since angle of incidence = angle of reflection
and it is given that angle of reflection is 30"
so,angle of incidence =30'
and it is given that angle of reflection is 30"
so,angle of incidence =30'
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