EM Spectrum

• What is one wave in the EM spectrum?

  Microwaves
• What wave in the EM spectrum has the longest wavelength?

  Radio waves
• What wave in the EM spectrum has the shortest wavelength?

  Gamma
• What are all the EM waves in the spectrum?

  Radio Waves

  Microwave

  Infrared

  Visible light

  Ultraviolet

  X-rays

  Gamma rays.
• What is a use of a radio wave?

  Communication
• What is a use of infra-red radiation?

  Thermal imaging
• What is a use of visible light?

  Vision
• What is a use of Ultraviolet light?

  Airport security

  Detecting forged money
• What is a use of X-ray waves?

  Medical imaging
• What is a use of microwaves?

  Cooking
• What is a use of gamma rays?

  Cancer treatment
• What is a danger of gamma rays?

  Ionisation
• What is a danger of X-ray waves?

  Ionising radiation
• What is a danger of Ultraviolet light?

  Skin cancer
• What is a danger of infra-red radiation?

  Burns
• What is a danger of radio waves?

  Damages tissue
• What is a danger of visible light?

  Blinding
• What is a danger of microwaves?

  Burns
• What is refraction?

  Refraction is the bending of light as it passes from one medium to another.