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Posted: 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.
Posted: Thu Oct 11, 2018 10:23 pm
Intensity can be measured by W/m^2 (watts per square meter).
Posted: 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.