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how to calculate speed of light through a medium. Although light does not travel far through lead before being absorbed high-energy gamma rays can travel a centimeter or so through lead at the speed calculated here Using the definition of n we can find the speed of light through lead. Quick video on how to calculate for either the frequency or wavelength of light using the speed of light equation.
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The lower the refractive index the faster the velocity of light. The speed of light in a vacuum is known to be 29979246 kms. Light is an electromagnetic wave which moves at a definite speed of eq3 times 108 eq ms in vacuum.
C the speed of light 300000 kms or 30 x 10 8 ms the wavelength of light usually measured in meters or Angstroems 1 A 10 -10 m f the frequency at which light waves pass by measured in units of per seconds 1s.
Light will travel faster through medium A at a velocity equal to the speed of light divided by the refractive index. Next measure the speed of light in the medium. As the slider is translated to the right the refractive index increases and the speed. For critical angle we will use snells lawC is critical angle and C 45onmedium sinC nair sin90 nair 1sinC S inC 1 sin451 nmedium 141we know that refractive index n speedof lightinmediumspeedof lightinvacuum where c 3108ms1414 vc v 14143108 v 212108ms.
