Waves with shorter wavelengths than those of visible light are called ultraviolet (UV) radiation.

Here's a breakdown of the electromagnetic spectrum:

* Radio waves: Longest wavelengths

* Microwaves: Shorter than radio waves

* Infrared (IR) radiation: Shorter than microwaves

* Visible light: The portion we can see (red has the longest wavelength, violet the shortest)

* Ultraviolet (UV) radiation: Shorter than visible light

* X-rays: Shorter than UV radiation

* Gamma rays: Shortest wavelengths