JEE Advanced | 2013Geometrical OpticsHard

Question

A ray of light travelling in the direction is incident on a plane mirror. After reflection,it travels along the direction . The angle of incidence is :-

Options

A.30o
B.45o
C.60o
D.75o

Solution


                


cos (180 - 2θ)


⇒    θ = 30o

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