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Purple visible light has a wavelength of 380 nm and red visible light 750 nm in...

Purple visible light has a wavelength of 380 nm and red visible light 750 nm in the air. Both of these lights are visible to the eye which has a refractive index of 1.34.
(a) Determine the wavelengths of the two lights when they hit the eyeball
(b) The frequency of light when in the eyeball
(c) The speed of light when in the eyeball

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