Question

If the speed of light is 2 into 10 to the power 8 mper second what will be the speed of light in water . The refractive index of glass with respect to water is 9 by 8

Answer 1

Answer:

Velocity V = 2.25 x 10^8 m s -1

refractive index = 9 / 8

refractive index of Glass = speed of light in medium 1 / speed of light in medium 2

9 / 8 = 2.25 x 10^8 / speed of light in glass

therefore, speed of light in glass = 2 x 10^8 ms-1

refractive index of Glass = wavelength of light in medium 1 / wavelength of light in medium 2

9/8=5400/ wavelength of light in glass

therefore,wavelength of light in glass =4800 A

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