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

Explanation

Frequency `=(1)/("period")`
`=(1)/(4xx10^(-8))=2.5 xx10^(7) s^(-1)`
` lamda = (c )/(v ) = ( 3xx10^(8))/(2.5xx10^(7))=12m`
` vec v = (1)/(v) =(1)/(12) = 0.083 m^(-1)`
`=8.3 xx10^(-2) m^(-1)`