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Refractive index of glass is 1.5 and that of water is 1.3. If the speed of light in water is 2.25xx10^8m/s. What is the speed of light in glass?

Answer»

Solution :Here `n_g=1.5` and `n_w=1.3` LET `v_1` and `v_2` be the speeds of light in glass and WATER RESPECTIVELY. If c is the speed of light in AIR then
`c//v_1=1.5`and`c//v_2=1.3` then,`V_1//v_2=1.3//1.5`
`v_1=1.3//1.5xx2.25xx10^8`
`v_1=1.95xx10^8m//s`
Speed of light in glass is `1.95xx10^8m//s`


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