Posted: Apr 26, 2017 3:19 pm
Cito di Pense wrote:
What's the intensity of the radiation? Some measure of the flux of energy normalized on a unit area. More photons per second per unit area, more photoelectrons. If something is varying in time or space (like your photoelectric example -- something resulting in more -- or fewer -- electrons emitted per second) then you can refer to the amplitude of the variation, and refer it to some base. Measurement units like MKS or CGS can be referred to as 'dimensions' of a problem, but only the distance units (meters or centimeters) reference an explicitly 'spatial' dimension.
You could vary the 'amplitude' of the incoming radiation by orienting the incoming beam obliquely. This affects the flux, too.
That was a rather jargon filled comment. Perhaps try simplifying it a tad?