The electromagnetic spectrum is a continuous range of all possible frequencies of electromagnetic radiation. Here's a breakdown:

* Radio waves: Lowest frequency, longest wavelength

* Microwaves: Slightly higher frequency than radio waves

* Infrared radiation: Higher frequency than microwaves, felt as heat

* Visible light: The only part of the electromagnetic spectrum humans can see (ROYGBIV)

* Ultraviolet radiation: Higher frequency than visible light, causes sunburns

* X-rays: Higher frequency than UV, used in medical imaging

* Gamma rays: Highest frequency, shortest wavelength, very high energy

Let me know if you have any more questions about the electromagnetic spectrum!