Define : angular dispersion and dispersive power.
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Dispersion is known as the phenomenon of splitting of white light into its constituent colours. ... The dispersive power of the material of a prism is defined as the ratio of angular dispersion for any two wavelengths to the deviation of mean wavelength.
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The phenomenon of splitting of light into its component colors is known as dispersion. The angle subtended between the direction of emergent violet and red rays of light from a prism is called angular dispersion. Dispersive power of the material of a prism is 0.0221.
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