electromagnetic waves

• what are electromagnetic waves

  tranverse waves
• what does transverse waves mean

  they oscillate perpendicular to the direction of enerhy transfer
• what speed do electromagnetic waves travel at in a vacuum

  3 x 108 m/s
• what happens to the frequency as you go along electromagnetic spectrum

  increases
• what happens to the wavelength as you go along electromagnetic spectrum

  decreases
• what can electromagnetic waves do

  absorbed

  transmitted

  reflected
• what are the 7 electromagnetic spectrum

  Radio waves

  Microwaves

  Infrared red

  Visible light

  Ultra violet

  X-rays

  Gamma rays
• what wavelength and frequency do radio waves have

  long wavelength

  Low frequency
• what wavelength and frequency do gamma rays have

  short wavelength

  high frequency
• what are ionising

  gamma rays

  x-rays
• what can be used for communication

  radio waves

  microwaves