# Photon wavelength calculator

Input
Output

nm

THz

This calculator computes the wavelength and frequency of a photon from its energy $E_{p}$. The photon frequency is
${\nu} = \dfrac{E_{p}}{h}$
${\lambda} = \dfrac{hc}{E_{p}}h$
where $h \approx 6.626\cdot 10^{-34} Js$ is the Planck constant and $c$ is the speed of light in vacuum.