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An experiment was performed in which neutrons were shot through two slits spaced 0.10 mm apart and detected 3.5 m behind the slits. Figure P38.49 shows the detector output. Notice the 100渭尘scale on the figure. To one significant figure, what was the speed of the neutrons?

Short Answer

Expert verified

The resultant value isv=1978ms

Step by step solution

01

Given information

Neutrons were fired through two slits spaced 0.10 mm apart and detected 3.5 m behind the slits in an experiment.

02

Calculations

In a double slit experiment, we can start with an expression for fringe spacing.

螖测=尝位d=螖测dL(express)=hmv(de Broglie wavelength)螖测dL=hmv(substitute)v=hL尘螖谤诲(expressv)螖测=70渭尘(we can see from graph in the text of the problem)v=6.631034351.671027701060.1103(substitute)v=1978ms

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