I'm getting so confused about this question, any help would be great. :)(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

Two infinite waves Ψ1, Ψ2 have the same wavelength and polarisation and have amplitudes of E1 = 3 and E2 = 7 units. They are added together with a phase difference of 125 degrees.

1) What will be the relative intensity of the resultant wave? Assume initial phase of 0 degrees for Ψ1.

2) In the same conditions, what will be the phase of the resultant wave (in degrees)?

2. Relevant equations

N/A

3. The attempt at a solution

So far I've got Ψ1=3sin(kx-ωt) and Ψ2=7sin(kx-ωt+2.182)

And I know that I is proportional to A squared.

Now I'm pretty stuck!

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Combination of two waves.

**Physics Forums | Science Articles, Homework Help, Discussion**