The vitreous humor, a transparent, gelatinous fluid that fills most of the eyeba

Question

The vitreous humor, a transparent, gelatinous fluid that fills most of the eyeball, has an index of refraction of 1 34. Visible light ranges in wavelength from 400 nm (violet) to 700 nm (red), as measured in air. This light travels through the vitreous humor and strikes the rods and cones at the surface of the retina. What are the ranges of the frequency of the light just as it approaches the retina within the vitreous humor? Answer in the order indicated. Separate your answers with a comma. What is the speed of the light just as it approaches the retina within the vitreous humor?

Explanation / Answer

Ans speed of light corresponding to refractive index 1.34

v=c/n=3*10^8/1.34=2.24*10^8 m/s

frequency corresponding to 400 nm wavelength

fmax=v/lemda=2.24*10^8/(400*10^-9)=5.6*10^14 Hz

   frequency corresponding to 700 nm wavelength

fmin=v/lemda=2.24*10^8/(700*10^-9)=3.2*10^14 Hz

therefore frequency range is 3.2*10^14-5.6*10^14 Hz

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