How does quantum theory explain the working of a photocell?

Each photon of light with a certain minimum energy releases an electron from an atom.

Explanation:

A photocell works on the principle of photoelectric effect. A proton is taken to have a particle nature hence photons have to interact with electrons.In this particular experiment, photons have energy greater than the work function of the metal and thus ejects electrons from the plate.

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .