Electromagnetic Spectrum

• Electromagnetic radiation is classified according to wavelength/frequency
• The Spectrum

  
• For all waves, frequency is inversely proportional to wavelength

  • EM waves with the shortest wavelength will have the highest frequency
  • EM waves with the longest wavelength will have the lowest frequency
• The higher the frequency the greater the energy of the EM wave
• When visible light (white light) is passed through a glass prism or rainbow, it splits into a continuous spectrum of colours
• • The "7" colours that appear are red, orange, yellow, green, blue, indigo, violet
  • Each colour has a specific wavelength and frequency
  • Red light has the longest wavelength
  • Violet light has the shortest wavelength