Yellow light emitted from a sodium lamp has a wavelength (lamda) of 580nm. Calculate the frequency (v) and the wave number (bar(v)) of the yellow light

Yellow light emitted from a sodium lamp has a wavelength (lamda) of 58

1.	Yellow light emitted from a sodium lamp has a wavelength (lamda) of 580nm. Calculate the frequency (v) and the wave number (bar(v)) of the yellow light
Answer» Solution :`LAMDA = 580 nm = 580 xx 10^(-9) m` Frequency, `V = (c)/(lamda) = (3.0 xx 10^(8) ms^(-1))/(580 xx 10^(-9) m) = 5.17 xx 10^(14) s^(-1)` Wave number, `bar(v) = (1)/(lamda) = (1)/(580 xx 10^(-9) m) =1.72 xx 10^(6) m^(-1)`