I have this problem: The total number of waves Nw in a box is somewhat uncertain beause of the way the amplitude falls off. For a region of size DeltaX, call the uncertainty in the number of waves DeltaNw. a.) Relate DeltaNw to the uncertainty principle in the wavelength Delta(lambda). Assuming DeltaNw is about +/- 1, write this relation as an uncertainty principle relating DeltaX and Delta(Lambda). I have no clue how to start this, but I do have this eqn from Feynman's lecture, which we're using. Delta(lambda)/lambda = 1/(N*m) where N = # of lines on the grating m = order of diffraction pattern. I don'tknow if this eqn. corresponds to this though. so I'll assume... Delta(lambda) = 1/(delta(Nw) ? Am I going about it the right way?