. A beam of monochromatic light undergoes minimum deviation through an equiangular prism, how does the beam pass through the prism, with respect to its


(a) A beam of monochromatic light undergoes minimum deviation through an equiangular prism, how does the beam pass through the prism, with respect to its base

(b) If white light is used in same way as in part (a) above, what change is expected in the emergent beam

(c) What conclusion do you draw about the nature of white light in part (b)

Best Answer

(a) The light beam inside the Prism will be parallel to the base.

Under minimum deviation,

angle of incidence = angle of emergence

(b) White light splits into its constituent colours. That is spectrum is formed.

(c) We conclude that white light is polychromatic in nature.

 

 

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