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!

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# Combination of two waves.

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