EM Radiation and Energy

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All sorts of objects give out EM radiation

EM Radiation is emitted from a source.....

  • Many things emit (give out) electromagnetic radiation
  • Things that emit EM radiation are called sources
  • For example, the sun emits heat, light and ultraviolet radiation
  • Heat radiation is infrared radiation
  • The frequency of heat (thermal) radiation given out by an object increases with temperatures
  • All types of EM radiation travel at the same speed in a vacuum (like space) - 300000km/s

.....And transmitted, reflected or absorbed somewhere else

  • When radiation is emitted from a source, it spreads out until it hits something
  • Three things can then happen
    • The radiation might be transmitted (keeps going) - like light passing


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