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

* Radio waves: Longest wavelengths, used for communication and broadcasting.

* Microwaves: Used in ovens and radar.

* Infrared radiation: Heat radiation, felt as warmth.

* Visible light: The range of colors we can see.

* Ultraviolet radiation: Can cause sunburns and skin cancer.

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

* Gamma rays: Shortest wavelengths, highest energy, emitted by radioactive materials and some astronomical objects.

Key takeaway: The shorter the wavelength, the higher the energy of the radiation.