A ray of monochromatic light is incident at a small angle of incidence on a small angle prism in air. Obtain the expression d= A(n-1), for deviation, d, of light by the prism where A is the refracting angle of the prism and n is the refractive index.

A ray of monochromatic light is incident at a small angle of incidence on a small angle prism in air. Obtain the expression d= A(n-1), for deviation, d, of light by the prism where A is the refracting angle of the prism and n is the refractive index.

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