How is forward biasing different from reverse biasing in a p-n junction diode?

The reverse biasing in a PN junction diode

In reverse biased p-n junction

Explain (i) forward biasing (ii) reverse biasing of a P-N junction diode. With the help of a circuit diagram, explain the use of this device as a half wave rectifier.

In forward biasing of the p-n junction

In forward biasing of the p-n junction: