1. I'm assuming that you're implying that there are more than 1 wavelength to light. That is true, my picture is grossly simplified. But even if there are different wavelengths, we could still get a shape similar to that through Fourier's Series. (See Figure 3)
2. Prove what? That I know more physics than Perfection, or prove that there's an edge. If you want proof of an edge, you can just look at Sims2789's picture. If you want proof that I know more physics than Perfection, then he'll just have to challenge me to a contest.