Calculate the wavenumber of yellow radiaiton having wave length `5800Å`.

Options

A. `1.724xx10^(4)cm^(-1)`
B. `2.742xx10^(4)cm^(-1)`
C. `4.271 xx 10^(4)cm^(-1)`
D. `2.174xx10^(4)cm^(-1)`

Answer

A

Explanation

`bar(v) = (1)/(lambda) = (1)/(5800 Å) = (1)/(5800xx10^(-10)m)`
`= 1.724 xx 10^(6)m^(-1) = 1.24 xx 10^(4)cm^(-1)`