# Equation needed

1. Feb 14, 2007

### Prasanna Suman

i desperately need the equation which relates the power of a an electromagnetic wave from a source which continously emits only one photon at a time.

2. Feb 15, 2007

### masudr

$$\mbox{Power} = \frac{\mbox{Energy deliverd}}{\mbox{Time taken to deliver energy}}$$

Do you know the energy of these photons and the rate of their emission?