Question

The wavenumber of radiation of wavelength 500 nm is

Answer 1

Wave no. = 1/wavelength
= 1/500 /nm
=0.002 /nm

Answer 2

Answer:

$\bar{\lambda}=2\times 10^6\ m^{-1}$

Explanation:

Given that,

Wavelength of a radiation, $\lambda=500\ nm=5\times 10^{-7}\ m$

We know that the wave number and wavelength follows inverse relation ship. it is represented by $\bar{\lambda}$. Mathematically, it is given by :

$\bar{\lambda}=\dfrac{1}{\lambda}$

$\bar{\lambda}=\dfrac{1}{5\times 10^{-7}}$

$\bar{\lambda}=2\times 10^6\ m^{-1}$

Hence, the wave number of the radiation is $2\times 10^6\ m^{-1}$. Hence, this is the required solution.