electromagnetic waves

• give order of electromagnetic waves in increasing wavelength

  1. gamma
  2. xray
  3. ultraviolet
  4. visible light
  5. infrared
  6. microwaves
  7. radiowaves
• give order of electromagnetic waves in increasing frequency

  1. radiowaves
  2. microwaves
  3. infrared
  4. visible light
  5. ultraviolet
  6. xray
  7. gamma rays
• describe production of radio waves

  produced by oscillating charges that create alternating charge with same frequency as radio wave
• give uses of radio waves

  television and radio
• give uses of microwaves

  satellite communication and cooking food
• describe affect of increased temperature on infrared radiation

  increase infrared radiation emitted
• give uses of infrared radiation

  infrared cameras, cooking food and electrical heaters
• describe presentation of colours

  wavelength reflected
• describe presentation of white and black

  white - all reflected

  black - all absorbed
• give uses of visible light

  fibre optic communications
• give uses of ultraviolet

  energy efficient light and sun tanning
• give uses of xrays and gamma rays

  medical imaging and treatments
• give dangerous forms of em waves

  ultraviolet, xrays and gamma rays
• give dangers of ultraviolet

  premature aging of skin and increase risk of skin cancer
• give dangers of xrays and gamma rays

  ionising causing gene mutation and cancer