The index of refraction for silicate flint glass is 1.66 for violet light that has a wavelength in air equal to 400 nm and 1.61 for red light that has a wavelength in air equal to 700nm. a ray of 700-nm wavelength red light and a ray of 400-nm wavelength violet light both have angles of refraction equal to 30 degrees upon entering the glass from the air.
(a) which is greater, the angle of incidence of the ray of red light or the angle of incidence of the ray of violet light? explain your answer.
(b) what is the difference betweeen the angles of incidence of the two rays?
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