This is called rectification, and rectifier diodes are most commonly used in low current power supplies. A switching diode is most often used to turn a circuit on or off, and band switching diodes are used for switching high frequency band signals.
Thunder occurs when energy from lightning heats and rapidly expands the air. The resulting sound wave gets heard as thunder. While lightning and thunder occur at roughly the same time, lightning travels at the speed of light, or at 186,000 miles a second, while thunder travels at the speed of sound, equivalent to one-fifth of a mile in one second. People see the lightning long before they hear the thunder.
These 10 animal facts will amaze you. Thunder is caused by the sudden expansion of the air around a lightning bolt's path. The deep rumbling and sharp cracks of thunder are produced as the air around the lightning bolt is superheated â up to about 54,000Â° Fahrenheit (about 33,000Â° Celsius) â and rapidly expands. This rapid expansion creates an acoustic shock wave that manifests itself as thunder. The closer the lightning is, the louder the clap of thunder will seem to be. Lightning is a discharge of electricity in the atmosphere.