# Homework Help: Photon Energy Problem

1. Oct 22, 2006

### McMaster_Girl

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

2. Oct 22, 2006

### Repetit

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.