An experiment was performed in which neutrons were shot through two slits spaced

Question

An experiment was performed in which neutrons were shot through two slits spaced 0.10 mm apart and detected 4.0 m behind the slits. The following figure shows the detector output. Notice the 100 m scale on the figure. (Figure 1)

Part A

To two significant figures, what was the speed of the neutrons?

Express your answer to two significant figures and include the appropriate units.

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Figure 1 of 1

An experiment was performed in which neutrons were shot through two slits spaced 0.10 mm apart and detected 4.0 m behind the slits. The following figure shows the detector output. Notice the 100 m scale on the figure. (Figure 1)

Part A

To two significant figures, what was the speed of the neutrons?

Express your answer to two significant figures and include the appropriate units.

SubmitMy AnswersGive Up

Incorrect; Try Again; 7 attempts remaining

Provide FeedbackContinue

Figure 1 of 1

Explanation / Answer

Relevant equations

y = L/d (spacing between maxima)

= h/mv (de Broglie )

m= 1.67*10^-27 Kg  

The spacing between the maxima appears to be (2/3)(100*10^-6) m in the figure,

so: (y*d)/L = = ((2/3)(100*10^-6 m)*(0.1*10^-3 m))/4 m = 1.67*10^-9 m = de Broglie

v = h/(m) = (6.626*10^-34 J.s)/((1.67*10^-27 Kg)*(1.67*10^-9 m) = 237.6 m/s

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