## Intensity

$c=\lambda v$

Kimberly 1H
Posts: 63
Joined: Fri Sep 28, 2018 12:17 am
Been upvoted: 1 time

### Intensity

I understand that intensity is the brightness of radiation and you calculate it by squaring the amplitude, but I'm not sure what units these are measured in.

Nicholas Carpo 1L
Posts: 36
Joined: Fri Sep 28, 2018 12:19 am

### Re: Intensity

Intensity can be measured by W/m^2 (watts per square meter).

Kayla Vo 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

### Re: Intensity

It's also good to keep in mind that in the wave model of electromagnetic radiation, intensity is proportional to the square of the amplitude. However, in the particle model, intensity is proportional to the number of photons present at an instant.