A wave of light having frequency 4 xx 10...

A wave of light having frequency `4 xx 10^(14)` Hz and speed of light `3 xx 10^(8)` m/s enters glass of R.I.1.5 Change in wavelength is

`2.5xx10^(-7)`

`2.5 xx 10^(-6)`

`2.5 xx 10^(-8)`

`2.5 xx 10^(-9)`

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