EM spectrum

• Long wavelength and Low Frequencies


  • Radio waves - radio, television and wireless communication
  • Microwaves - communications and transferring energy to food
  • Infrared - transfers energy to food and for security systems
  • Visible light - to see and light bulbs
• Short wavelength and High frequencies 


  • Ultraviolet - kills bacteria and is a steriliser
  • X-rays - airport security
  • Gamma rays - detects cancer in the body