The part of the electromagnetic spectrum with the shortest wavelengths is gamma rays.

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

* Radio waves: Longest wavelengths, lowest energy

* Microwaves: Shorter wavelengths than radio waves, higher energy

* Infrared radiation: Even shorter wavelengths, higher energy

* Visible light: The range of wavelengths our eyes can see

* Ultraviolet radiation: Shorter wavelengths than visible light, higher energy

* X-rays: Even shorter wavelengths, higher energy

* Gamma rays: Shortest wavelengths, highest energy