5 4 points total While the index of refraction of a material is a constant it varies slightly based on the wavelength color of

Question

5 4 points total While the index of refraction of a material is a constant it varies slightly based on the wavelength color of light This phenomenon is known as dispersion and is the reason a glass prism is able to separate white light into a spectrum of colors The plot at right shows how the index of refraction of a typical glass ng 1 5 varies for the visible wavelengths a Index of refraction n 1 50 1 45 350 1 5 points On the figure at right white light is incident on a triangular glass prism which separates the white light into a spectrum The three rays shown represent blue red and green light Indicate which of these three rays is which color Explain your reasoning using the plot above 450 550 650 Wavelength nm 750 b 1 point When it is in glass does red light travel faster or slower than blue light Explain c 1 5 points How far would light need to travel in a glass cable for the faster color to arrive at the end one microsecond ahead of the slower color Show your work and explain

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