Tue February 24, 2009 By: Ashwati Menon

why is it that the speed of red light is more than violet light in glass(prism)?

Expert Reply
Thu February 26, 2009

this is because refractive index of glass for red light is less than that for violet color.

since refractive index = c / v or v = c / refractive index

therefore less the refractive index greater the speed of light.

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