Yellow light emitted from a sodium lamp has eavelenght (i) of `580 nm` .Find the frequency (v) wavelength `(barv)` of the yellow light

Explanation

Wavelength `(lambda)` of the radition `= 580 nm = 580 xx 10^(-19)m = 5.80 xx 10^(-7)m`
Velocity of radition `c= 3 xx 10^(8)m s^(-1)`
`c = v lambda`
:. Frequency `v = (c )/(lambda) = (3 xx 10^(8) ms^(-1))/(5.80 xx 10^(-7)m) = 5.17 xx 10^(14)s^(-1)`
Wavelength `bar v = (1)/(lambda) = (1)/( 5.80 xx 10^(-7) m) = 1.72 xx 10^(6)m^(-1)`