Wave property of electron implies that they will show diffraction effected . Davisson and Germer demonstrated this by diffracting electron from crystals . The law governing the diffraction from a crystals is obtained by requiring that electron waves reflected from the planes of atoms in a crystal interfere constructiely as shown in figure
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In an experiment,electrons are made to pass through a narrow slit of width d comparable to their de-Broglie wave length. 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 ).

Options

A.
.
B.
.
C.
.
D.
.