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The wave number of a beam of light in ai...

The wave number of a beam of light in air is `5 xx 10^(6) m^(-1)`. If the velocity of light in air is `3 xx 10^(8) m//s`, find the frequency of the light.

Text Solution

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Data: `vecv_(a) = 5 xx 10^(6)m^(-1), c=3 xx 10^(8)m//s`
`vecv=1/lambda` and `c=lambdav`
`therefore` The frequency of light,
`v=c/lambda = cvecv = (3 xx 10^(8))(5 xx 10^(6))= 1.5 xx 10^(15)` Hz
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