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Question

If the velocity of light in glass is 2×108m/s, then find its velocity in water, if ng=1.5 and nw=4/3.
  1. 3×108m/s
  2. 1.5×105m/s
  3. 2.66×108m/s
  4. 2.25×108m/s

A
3×108m/s
B
2.66×108m/s
C
1.5×105m/s
D
2.25×108m/s
Solution
Verified by Toppr

Given,ng=1.5,nw=4/3andvelocityoflightinglassis2×108 m/s.velocityoflightinwaterisvg×ngnw=2×108×1.54/3=2.25×108.

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