Intensity


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Kimberly 1H
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Intensity

Postby Kimberly 1H » Thu Oct 11, 2018 10:11 pm

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

Re: Intensity

Postby Nicholas Carpo 1L » Thu Oct 11, 2018 10:23 pm

Intensity can be measured by W/m^2 (watts per square meter).
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Kayla Vo 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

Re: Intensity

Postby Kayla Vo 1B » Thu Oct 11, 2018 10:41 pm

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.
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