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how to measure speed of light in glass. The refractive index of air for visible light is about 10003 so the speed of light in air is about 90 kms 56 mis slower than c. How many speed of light glass in 1 centimetreJulian year.
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He would then have found 133 to be the appropriate index of refraction for water in all other situations such as when a ray passes from water to glass. Today we can verify that the index of refraction is related to the speed of light in a medium by measuring that speed directly. A The speed of light passing through a medium is 18 x 10 8 m s -1.
A The speed of light passing through a medium is 18 x 10 8 m s -1.
You can view more details on each measurement unit. For example glass would have a refractive index of 15 which means that in glass light travels at 1 15 067 times the speed of light in a vacuum. For example for visible light the refractive index of glass is typically around 15 meaning that light in glass travels at c 15 200 000 kms 124 000 mis. You can view more details on each measurement unit.
