A beam of monochromatic blue light of wavelength 4200

Asked by admin @ 16/08/2021 in Physics viewed by 324 People

A beam of monochromatic blue light of wavelength 4200 Å in air travels in water [refractive index = (4/3)]. Its

wavelength in water will be.

Answered by admin @ 16/08/2021

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Since refractive index = wavelength in vaccum/wavelength in medium

By taking the value of refractive index of water as 1.33, we get

1.33= 4200/wavelength in water

=>Wavelength of light in water=3150A°

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A parallel beam of monochromatic light of wavelength 5000

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