A ray of light falls on the surface of a spherical glass paper weight making an angle α with the normal and is refracted in the medium at an angle β . The angle of deviation of the emergent ray from the direction of the incident ray is Options: A . &nbsp(α−β) B . &nbsp2(α−β) C . &nbsp(α−β)2 D . &nbsp(α+β)

Answer: Option B : B From figure it is clear that Δ O B C is an isosceles triangle , Hence ∠ O C B = β and emergent angle is α Also sum of two in terior angles = exterior angle ∴ δ = ( α − β ) + ( α − β ) = 2 ( α − β )

A ray of light falls on the surface of a spherical glass paper weight making an

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