What causes difference in velocity of colours while passing from one medium to another through glass prism?

Different wavelengths

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Different amplitudes

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Different colours

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None of the above

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Solution

The correct option is A Different wavelengths
Different wavelengths causes difference in velocity of colours while passing from one medium to another through glass prism,because every colour has different wavelength.And refractive index depends on wavelength of light so different wavelength mean different refractive index which means different velocities.

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