physics question 2

Question

physics question 2

kittykat · Answer

attachment

kittykat · Answer

@Evoker

evoker · Answer

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

kittykat · Answer

i know one formula Ep=Ek+w?

evoker · Answer

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

evoker · Answer

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

evoker · Answer

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.

evoker · Answer

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.

osprey · Answer

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