AIEEE 2008 Solved Paper

In an experiment, electrons are made to pass through a narrow slit of width ' d ' comparable to their de Broglie wavelength. They are detected on a screen at a distance ‌′D′ from the slit (see figure).Which of the following graphs can be expected to represent the number of electrons 'N' detected as a function of the detector position 'y' (y=0 corresponds to the middle of the slit )