Here's a breakdown of the electromagnetic spectrum from longest to shortest wavelength:

* Radio waves: Used in communication, broadcasting, and radar.

* Microwaves: Used in ovens, communication, and radar.

* Infrared radiation: Used in heat sensing, night vision, and thermal imaging.

* Visible light: The only part of the electromagnetic spectrum that humans can see.

* Ultraviolet radiation: Can cause sunburn and skin cancer.

* X-rays: Used in medical imaging and security scanning.

* Gamma rays: The most energetic form of electromagnetic radiation, emitted by radioactive decay and nuclear reactions.

Gamma rays have the highest energy and shortest wavelength, often smaller than the size of an atom!