Homework Statement
The complex amplitudes of a monochromatic wave of wavelength ##\lambda## in the z=0 and z=d planes are f(x,y) and g(x,y), redprctively. Assume ##d=10^4 \lambda##, use harmonic analysis to determine g(x,y) in the following cases:
(a) f(x,y)=1
...
(d) ##f(x,y)=cos^2(\pi y / 2...