(b) Why is the absolute refractive index of a medium always greater than one?
© Calculate speed of light in glass if it has refractive index 1.5.
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8
Answer:
As absolute refractive index is ratio of speed of light in vacuum to that in the given medium, we can say it is alwaysgreater than one. This is because light travels with the highest speed in vacuum.
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1
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,kyoki air me light ka speed highest hota hai ,i mean speed of light is highest in vaccum than any other medium.
1.5=3*10^8/speed in glass
speed of light in glass =2*10^8 m/s
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