If the amplitude of three intersecting waves is given by how can I then find the intensity at r = 200 m as a function of ? I know that intensity is the square of the amplitude. Should I simply square y(r,t)? If I do, I get I as a function of t as well, because of the part .
If the waves have the same frequency then ωt=θ Transform the exponential term into a polar representation (cos(x)+jsin(x)) and then find the modulus (amplitude) of the resulting complex number.