Monday, 1 February 2016

visible light - Speed of different em radiation in a medium



Does all frequency of light travel with the same speed in a particular material like glass?


Since by cauchy's relation refractive index change with wavelength which implies the speed also changes.


But as derived from maxwells equation, the speed of light should only depent on medium through which it travel and not on its frequency or wavelength. V=1/sqrt(epsilon*mu)


Does different colours have different speed in a particular medium?




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