the speed of light in air is 3 × 10 raise to 8 m/s. If the refractive index of Glass is 1.5 then find the time taken by light to travel a distance of 20cm in glass
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n = c/v
v = c/n = 3*10^8/1.5 = 2*10^8 m/s
t = d/v = 20*10^-2 / 2*10^8
t = 10^-9 sec
zaidshaikh2793:
ok
thanks a lot bro
you're welcome
there is one more question for you...
where
why two sources of light must be equally bright ? Explain .
In which theory it belongs to?
wave theory of light
as There should no phase difference....
thanx
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