What is the order of depletion layer width?

Explain the terms depletion layer

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

Depletion layer consists of:

What is the root cause of depletion of ozone layer?

Explain how the width of depletion layer in p-n junction diode changes when the junction is reverse biased.