calculate the wavelength frequency and wavenumber of a light wave whose period is ` 2.0 xx 10^(-10) s` .

Explanation

`T=2.0xx10^(-10) s`
Frequency, `v=1/T=1/(2.0xx10^(-10))=5xx10^(9) s^(-1)`
`v=c/lambda, c=bar(v) lambda`
`3xx10^(8)=5xx10^(9)xxlambda`
`lambda=(3xx10^(8))/(5xx10^(9))=6.0xx10^(-2) m`
Wave number, `bar(v)=1/lambda=1/(6.0xx10^(-2))=100/6=16.66 m^(-1)`