The figure(Figure 1) shows a neutron in a one- dimensional box. If the right end

Question

The figure(Figure 1) shows a neutron in a one- dimensional box. If the right end of the box is opened, the neutron travels out of the box, impinges on a double slit, and is detected 2.0 m behind the double slit. Repeating the experiment over and over produces the fringe pattern shown in the figure Part A What is the length (in nm) of the box? Express your answer using two significant figures. nm Figure 1 of 1 Submit Request Answer Provide Feedback Next > 2.0 m Slit spacing 1 5 m 0.40 mm L. Door opens Number of neutrois

Explanation / Answer

The distance of maxims of order m from the central maxima is y

=order x wavelength x distance

y=m x w x D/d

0.2E-3=3 w 2/15E-6

==> w=5E-10 m

From the figure 2w=L

==> L=2 x 5E-3=1E-9 = 1nm

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