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Since ∠i=∠r , ∠r=20°
The required angle=
Ans: The angle between the incident and reflected rays is 40°.
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We r given angle i=20 According to the law of reflection Angle of incidence is equal to angle of reflection. Thus angle r= 20 Now angle formed between incident and reflected ray= angle i+ angle r. Thus, measure of d angle =20+20=40
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