# Homework Help: Maxwell's Rainbow Problem frequency/wavelength

1. Aug 15, 2011

### arl146

1. The problem statement, all variables and given/known data
A certain helium-neon laser emits red light in a narrow band of wavelengths centered at 632.8nm and with a wavelength width if .01nm. What is corresponding frequency width for the emission?

2. Relevant equations
f=c/$\lambda$ ?

3. The attempt at a solution
I tried using the above with both numbers given. This is supposed to be an easy problem, but i think theres something im missing here... Answer is 7.49GHz?

2. Aug 15, 2011

### arl146

are you supposed to use both numbers given.. this has to be easier than im thinking