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  • Created by: Emma
  • Created on: 22-03-13 15:29



  • different types of electromagnetic radiation.
  • As the frequency of light increases, its energy also increases.
  • The higher the frequency of radiation, the higher its energy.

Energy = Planck’s Constant x Frequency of light

Planck’s constant = 6.63 x 10-34J Hz-1

Energy Interacts with Matter

A molecule has energy associated with four different aspects of its behaviour:

  • Translation- the molecule moving around as a whole.
  • Rotation-the rotation of the molecule as a whole.
  • Vibration-the vibration of the bonds.
  • Electronic- electrons moving from one energy level to another.


The amount of energy required increases down the list.

  • All other energy is also quantised


The spacing between


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