Comments on Photon Flux

Comments

energy of photon

If the energy of photon is given by hc/wavelength, hc = 1.24e-6 [eV.m].
For a 0.5 [micrometer] wavelength the photon energy would be 2.48 [V].
Why do you multiply with the electron charge?

energy of photon

Do you mean 2.48 [eV] right? that's typo.
So, why do you multipy with the electron charge?
Because if you want to change the Unit of Energy from [eV] to [Joule] you must do that.
remember, 1 [eV] = 1.602e-19 [joule] ---> 1 = 1.602e-19 [joule/eV]

in power density

i think the term with Energy of photon that multiply with electron charge is wrong. thats mean maybe change of the Energy unit to Joule.

yeap!

i think you are absolutely right!

sorry

q is redundant in the eV formula. if we want to find it as Joule then we must divide it by q but it multiplied it by q. that is absolutely an error.

definition of flux is wrong

To the best of my knowledge, the definition of flux is basically the amount of a physical quantity passing through a surface perpendicularly per unit time, i.e. the flow.
So by that definition: flux (phi) = (# photons/time)*Area projected
What has been defined instead is called radiant intensity.

Photon Flux

from where to get Photon value of flux?