15. Calculate the speed of light in the following media:
a) Flint glass (n = 1.91) i?
b) Crown glass (n = 1.50)
c) Ethyl alcohol (n = 1.36)
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The speed of light in vaccum, flint glass and crown glass is 3. 00×108m/s,1.
The speed of light in crown glass is the speed of light in a vacuum divided by the index of refraction of crown glass, which is 1.52. This works out to 1.97 times 10 to the 8 meters per second is the speed of light in crown glass
The speed of light in ethyl alcohol (n = 1.36) is 2.21 × 108 m/s.
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