During dispersion of white light by prism placed in air,

only angular spread takes place

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only angular deviation takes place

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both angular deviation and angular spread take place

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either angular spread or angular deviation for the mean colour takes place depending on the angle of the prism

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Solution

The correct option is C
both angular deviation and angular spread take place

During dispersion of white light by prism placed in air, the light bends (angular deviation) as well as there is spread in width, that is colours (angular spread).

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