# Photon wavelength calculator

## About this calculator

This calculator computes the wavelength and frequency of a photon from its energy $E_{p}$. The photon frequency is

${\nu} = \dfrac{E_{p}}{h}$

and the photon wavelength is

${\lambda} = \dfrac{hc}{E_{p}}h$

where $h \approx 6.626\cdot 10^{-34} Js$ is the Planck constant and $c$ is the speed of light in vacuum.