1.

4. (a) A ray of light strikes the mirror at an angle of 20. Whais the angle ofreflection?(b) Give the angle of incidence and reflection for normal incidence

Answer»

a) Angle of incidence = 90-20 = 70 degrees.Angle of reflection = Angle of incidence = 70 degrees.b)For normal incidence, angle of incidence = Angle of reflection = 0 degrees.



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