But there is a way to rearrange it so that x only. This division produces a whole number. The energy of a photon of light hf and the work function f is the minimum energy required to remove an electron from the surface of the material.
In physics we can define energy as the capacity to do work.
Work done is defined as the dot product of force and displacement. This division produces a whole number. W F d. That formula looks like magic but you can follow the steps to see how it comes about.