Why does the width of depletion layer of a p-n junction increase in reverse biasing?

Why does the thickness of depletion layer of pn-junction increases in reverse biasing ? Draw the circuit diagram of reverse biasing.

What is the width n cm of depletion layer in p-n junction?

The n-side of the depletion layer of a p-n junction :

The width of depletion regio of p-n junction diode is

How does width of depletion layer of p-n junction diode change with decrease in reverse bias ?

How does the width of the depletion layer of a p-n junction diode change with decrease in reverse bias?