Comment No need for laser... (Score 1) 310
With the double slit scheme you don't need a coherent light source (the 2 slits work as 2 in-phase light sources). The slits (both their thickness and distance) need to be (loosely) the wavelenght size (that meaning, with visible light, you need special slits made in film; you can do one with photographical methods I suppose, or buy one (easier :) ). If you wan't to "see" the effect happen, maybe you should try with waterwaves.
The fourier transform property is used widely, and you can do amazing stuff simply with carefully painted films, like filter-out low space frequencies to have just the high-freq details etc (more commonly used to clean noise).
The fourier transform property is used widely, and you can do amazing stuff simply with carefully painted films, like filter-out low space frequencies to have just the high-freq details etc (more commonly used to clean noise).
