P1 Topic 2

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In 1800, William Herschel discovered Infra Red radiation. What equipment did he use ?

  • Photographic salts
  • A prism and blackened thermometer
  • Coloured lights and a spectroscope
  • An infra red camera

Which part of the Electromagnetic Spectrum did Johann Ritter discover in 1801 ?

  • Infra red with a prism and blackened thermometer
  • Radio waves with a Cathode Ray Oscilloscope
  • CMB (Cosmic Microwave Background) with a radio telescope
  • Ultra violet radiation with the photographic salt, silver chloride

Complete this sequence of the Electromagnetic Spectrum. Radio waves, microwaves, Infra red, Visible light, ...............

  • x-rays, gamma rays, ultraviolet
  • ultraviolet, gamma rays, x-rays
  • ultraviolet, x-rays, gamma rays
  • gamma rays, x-rays, ultraviolet

Which rays in the Electromagnetic Spectrum have the highest frequency / energy ?

  • Radio waves
  • Infra red
  • Ultraviolet
  • Gamma rays

Which area of the Electromagnetic Spectrum have the lowest wavelength ?

  • Radio waves
  • Infra red
  • Ultra violet
  • Gamma rays

Select the answer which shows waves listed in order of increasing danger

  • Visible light, ultraviolet, microwaves
  • Radio waves, visible light, microwaves
  • Radio waves, microwaves, visible light
  • Visible light, infra red, gamma rays

Harmful effects of excessive exposure to microwaves are:

  • Skin burns
  • Damage to surface cells and eyes leading to skin cancer
  • Mutation of body cells
  • Internal heating of body cells

Harmful effects of excessive exposure to ultra violet radiation are:

  • Skin burns
  • Damage to surface cells and eyes leading to skin cancer
  • Mutation of body cells
  • Internal heating of body cells

The waves used for communication, satellite transmission and broadcasting are called:

  • X-rays
  • Radio waves
  • Ultra violet
  • Visible light

Radioactive materials are sources of Alpha and Beta particles and Gamma rays. These are collectively called:

  • Ions
  • Ionising radiation
  • Electromagnetic waves
  • Radiation