# Finding frequencies and wavelengths

1. Sep 26, 2016

### givemeknowledge

Hey! I'm struggling really badly with some physics homework, we've done nothing on this stuff in class and I can't find ANY help online and I'm stressing pretty bad right now so ANY help would be AMAZING!

Here's my questions...

"This question is about electromagnetic waves travelling in free space:
(a) Find the frequency of a wave where the wavelength = 1cm
(b) Find the wavelength of a wave with a frequency of 100 MHz
(c) Find the wavelength of a wave with a frequency of 300 MHz"

I assure you I have tried for HOURS to get my head around these I just can't and am desperate for some help!
Thank you SO much in advance!

2. Sep 26, 2016

### drvrm

pl. show what you have done to solve the problem....
you must have read about electromagnetic waves or simply waves moving in space or a medium.
what is wavelength ?
what is called frequency of a wave?
and how the wavelength and frequency gets related -through some other constant of the wave?

3. Sep 26, 2016

### CWatters

+1

You appear to be missing just one equation that relates frequency, velocity and wavelength. Look it up.