- #1
physlol
- 3
- 0
Homework Statement
To waves with the same frequency interfere. The intensity of the two waves are I1 and I2. Show that the resultant intensity is:
I = I1 +I2 + 2*sqrt(I1*I2)*cos(δ)
Where δ is the phase difference between the two waves.
Hint: Use the relation between intensity and amplitude.
Homework Equations
None given, except the one above.
The Attempt at a Solution
Tried alot, but i really don't have a clue. Firstly: What is the relation between intensity and amplitude?
And I'm sorry for my language. English, as well as physics obviously, are not mye favourite subjects :)