Why do we observe the seven colours when white light passes through a glass prism? Which component of white light deviates the least?
(D) When white light passes through a glass prism,it undergoes dispersion because the prism offers different refractive indices for different wavelengths of light.
Since the speed of light of different colours is different in the glass medium,each colour bends (refracts) by a different angle.
Violet light has the shortest wavelength and bends the most,while red light has the longest wavelength and bends the least.
Therefore,the red light deviates the least.
Since the speed of light of different colours is different in the glass medium,each colour bends (refracts) by a different angle.
Violet light has the shortest wavelength and bends the most,while red light has the longest wavelength and bends the least.
Therefore,the red light deviates the least.
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