What are the different types of electromagnetic waves?

Electromagnetic waves come in seven main types, grouped in the electromagnetic spectrum, based on their frequency and wavelength.

From longest wavelength (lowest frequency) to shortest (highest frequency):

1. Radio Waves
   • Used in: Radios, TVs, mobile phones
   • Longest wavelength, lowest energy
2. Microwaves
   • Used in: Microwave ovens, radar, satellite communication
3. Infrared (IR)
   • Felt as: Heat
   • Used in: Remote controls, thermal cameras
4. Visible Light
   • The only EM waves we can see
   • Colors: Red to violet (red has longest wavelength, violet shortest)
5. Ultraviolet (UV)
   • Comes from: The Sun
   • Can cause: Sunburn
   • Used in: Sterilization, black lights
6. X-Rays
   • Used in: Medical imaging (bones and teeth)
   • High energy, can pass through soft tissues
7. Gamma Rays
   • Highest frequency, most energy
   • Comes from: Radioactive materials, space
   • Used in: Cancer treatment, sterilizing medical equipment

Summary:

These types differ in wavelength, frequency, and energy, but all travel at the speed of light.