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Unformatted text preview: 8 m/s = 670 billion mph this finite speed has a real effect on information carried by light • it takes 1 1/4 seconds for light to reach us from the moon • it takes 8 1/3 minutes for light to reach us from the sun • it takes 4 1/3 years for light to reach us from the nearest star Think of light as a wave wavelength = the distance between wave crests the wavelength is indicated by the Greek symbol " λ " in the figure above. frequency = number of wave crests per second passing a point We assume that each wave is traveling at the same speed in this figure. color is determined by wavelength (or frequency)...
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This note was uploaded on 03/09/2012 for the course AST 1002 taught by Professor Emilyhoward during the Spring '10 term at Broward College.
- Spring '10