Interference (P5)

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  • Created by: caits
  • Created on: 13-04-14 17:02

Interference happens when two waves overlap. 

Constructive Interference:

Reinforcement of waves - when they arrive in phase they reinforce each other to give a wave of greater amplitude. 


Destructive Interference:

Cancelation of waves - when they arrive out of phase they cancel out


Sources of light need to be coherent. This means they emit light of the same frequency/colour (monochromatic) same amlitude, in phase. 

Path Difference:


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