Here it says with the surface of a metal exposed to photons at a frequency of 7.13×1016 seconds, inverse electrons are emitted with a maximum kinetic energy of 6.30×10-19 Joules. Here we need to calculate the work function of the metal. All right, So first of all, remember work function is another name for binding energy or threshold frequency. So this is EBE.
Now remember we're going to say the energy. Total energy of our photon equals binding energy, or in this case work function plus kinetic energy. In terms of energy of a photon that equals Planck's constant times your frequency O. Using that frequency given to us initially will help us to figure out the total energy of our photon.
So here those Planck's constant plug in your frequency. So when we do that, we're going to get our energy of our photon as 4.7243×10-17 joules. So take that and plug it in 4.7243×10-17 joules. Binding energy or in this case work function, is what we're looking for, and they give us the kinetic energy as 6.30×10-19 Joules.
Subtract that out from both sides and we'll have our work function at the end. So then here when we take that and plug it in, we're going to have our binding energy or our work function as equaling 4.66×10-17 Joules as our final answer for our.