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Unformatted text preview: Experiment 10 Dispersion from a Prism and the Index of Refraction of the Prism Mark Sawh Date Preformed 11/03/09 Date Due 11/10/09 Purpose • To study the dispersion spectrum from a prism. • To measure the index of refraction (n) using Snell’s Law, minimum deviation from a prism, total internal reflection, Brewster’s angle and apparent depth. Theory • When a monochromatic light beam in air, obliquely incident on the surfaceof a transparent medium, is refracted and deviated from its original didrection in accordance with Snell’s law: o = n sinθ2sinθ1 • If the incident light is not monochromatic, each component wavelength (color) is refracted differently because the wave speed is slightly different for different wavelengths in a medium. • The dependence of the wave speed (or the index of refraction) on the wavelength is called dispersion. • The frequency of a wave is unchanged when it propagates from one medium into another. • The index of refraction is slightly different for different wavelengths....
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- Spring '11
- Physics, Index of Refraction, refractive index, Total internal reflection, Geometrical optics