Question

How are ionization energy and the photoelectric effect related?

Answer 1

I tried this:

Explanation:

In the Photoelectric Effect light of a certain frequency `f` hitting the surface of a metal frees electrons that will be emitted from the metal.
This is because the photons of light carry an energy `E=hf` (`h` is Planck's constant) that it is enough to ionize the surface atoms of the metal.
So, basically, light will supply the right energy to ionize the atoms of the metal.

Hope it helps.