# How would you calculate the energy of a photon with a known frequency?

## For example, if the frequency is "8x10^13Hz"

Nov 18, 2015

The energy of the photon can be calculated using $E = h v$

#### Explanation:

In the formula $E = h v$:

$E$ is the energy in Joules
$h$ is Planck's Constant and
$v$ is the frequency of the photon (light)

So therefore the Energy of a photon with a frequency of $8 \cdot {10}^{13}$ Hz will be:

$E = h v$
$E = 6.626 \cdot {10}^{- 34}$ ${m}^{2}$.$k g$/$s$ x $8 \cdot {10}^{13}$ Hz
$E = 5.3 \cdot {10}^{-} 20$ Joules

Therefore the energy of the photon is $5.3 \cdot {10}^{-} 20$ Joules

Hope I helped :)