• Support PF! Buy your school textbooks, materials and every day products via PF Here!

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!

Want to reply to this thread?

"Wave intensity" You must log in or register to reply here.

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving