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Wave intensity

  • Thread starter borvis
  • Start date
1. The problem statement, all variables and given/known data

I have two waves interferencing with the same wavelenght [tex]\lambda[/tex] and average intensity [tex]I_{o}[/tex]. They also have a constant phasedifference of [tex]\varphi[/tex].


2. Relevant equations

The problem is that I dont know any equations or relations for the intensity of waves. I have a lousy compenium in this class.

3. The attempt at a solution

Im supposed to show that [tex]I_{tot}=4I_{o}cos(\frac{\varphi}{2})[/tex].

This is probably quite easy to show, but I'm really stuck. Some information about the intensity of classical waves would be really helpful. Thanks alot!
 

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