* Electromagnetic Spectrum: Electromagnetic radiation, including light, is characterized by its wavelength. The electromagnetic spectrum arranges these wavelengths from shortest to longest.

* Order of Wavelengths:

* Gamma Rays: Shortest wavelength (highest energy)

* X-rays: Shorter than ultraviolet

* Ultraviolet: Shorter than visible light

* Visible Light: The colors we see (violet has the shortest visible wavelength, red has the longest)

* Infrared: Longer than visible light

* Microwaves: Longer than infrared

* Radio Waves: Longest wavelength (lowest energy)

Therefore, infrared radiation has the longest wavelength among the options provided.