# Photon Energy Problem

What is the energy carried by a mole of photons of wavelength 522nm which is associated with green light?

## Answers and Replies

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Find the energy carried by one photon and multiply by Avogadro's number.

In terms of frequency the energy carried by a photon is:

$$E=h \nu$$

Where h is Planck's constant and $$\nu$$ is the frequency. So you have to express the frequency through the wavelength.