Question

physics question 2

Answer 1

@Evoker

Answer 2

Ahh well let see do you know the energy of a photon?

Answer 3

i know one formula Ep=Ek+w?

Answer 4

something like that anyways you need to find the energy of the photon and compare it to the energy of the Work function.

Answer 5

And yes the difference will give you the kinetic energy of the electron

Answer 6

So anyways the energy of a photon is hf, so take that and subtract the work function to find the kinetic energy of the photon.

Answer 7

Finally to find the stopping potential you need a potential so that the work done by the potential reduces the kinetic energy to 0, or eV=Ek from your equation.

Answer 8

Millikan and the photoelectric effect.
Professor Millikan, that is, Nobel Laureate
couple of things enclosed. A short version and a longer version.
miaow.