Lec22-LPN

Lec22-LPN - ture 22-1 ture Maxwells Rainbow Light is an...

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cture 22- cture 22- 1 Maxwell’s Rainbow Light is an Electromagnetic Wave
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cture 22- cture 22- 2 The Speed of Light Classic experiments to measure the speed of light: Galileo ( lantern and shutter ) Römer ( eclipses of Io behind Jupiter ) Fizeau ( toothed wheel ) Foucault ( plane rotating mirror ) Michelson ( octagonal rotating mirror ) Michelson and Morley ( interferometer ) 299,792,458 / c m s Speed of light is not infinite! Speed of light is not dependent on the motion of source/observer ( no fixed “ ether ”)
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cture 22- cture 22- 3 ©2008 by W.H. Freeman and Company
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cture 22- 4 Refraction and Transmission incident ray reflected ray refracted ray Medium 1 Medium 2 When light encounters an interface between different media, it can generally both reflect and refract . (This speed can even depend on wavelength.) Light can travel through matter medium as well as free space (vacuum). Inside matter, the speed of light v is generally less than c . ( 29
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Lec22-LPN - ture 22-1 ture Maxwells Rainbow Light is an...

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