Q.No.111(c): - Why ordinary light
disperses from any other dense medium?
Ans: - As we know
that white light is the superposition of waves with wavelengths of visible
spectrum and the speed of light in air or vacuum is the same for all
wavelengths, but the speed in a material substance is different for different
wavelengths. That’s why when white light passes through material medium then it
splits because it doesn’t consists of single wavelength but many wavelengths.
This is called dispersion
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