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Light Wave Properties Summary
Editor's Notes
- a. Snell's Law n 1 sin 1 = n 2 sin 2 b. Critical angle ( Symbol: c ) angle of incidence for which angle of refraction is 90° (as light passes from a medium (n) into air or a vacuum) sin c = 1/n (from nsin c = 1.00sin 90°) c. Total internal reflection occurs when angle of incidence is greater than critical angle. Examples : fiber optics sparkling diamond rainbow d. Dispersion separation of polychromatic light into its component wavelengths as the light enters a dispersive medium obliquely. Different frequencies (colors) of light travel at different speeds through a dispersive medium. Red, blue, and green light make white i. Dispersive medium A substance in which the speed of a wave depends on its frequency. Glass is a dispersive medium for light. Examples : Diamond Rainbow Chandelier Prism ii. Non-dispersive medium One in which the speed of the wave does not depend on the frequency. A vacuum is non-dispersive for light.