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jaidon
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A monochromated beam of neutrons (speed 0.40 m/s) is directed through a double slit with 1.0 mm separation. An array of detectors is placed 10m from the slit.
a)what is the de Broglie wavelength of the neutrons?
b)how far off-axis is the first zero-intensity point on the detector array?
c)explain why we cannot measure which slit a neutron passed through while forming a diffraction pattern.
for a) i used lambda= h/p and came up with 9.89*10^-7. i hope this is right.
the rest of the question is a problem. i am lost. the only equations i can find are Dsin(theta) =nlambda (given by my proff) and Dsin(theta)= lambda/2. i know that i can't just use either of these equations on their own, but i am baffled as to what i should use. I'm not looking for anyone to pretty much do the question, i just need a nudge in the right direction and hopefully a simple explanation as to what is actually going on in this situation, and what the question is asking. thanks
a)what is the de Broglie wavelength of the neutrons?
b)how far off-axis is the first zero-intensity point on the detector array?
c)explain why we cannot measure which slit a neutron passed through while forming a diffraction pattern.
for a) i used lambda= h/p and came up with 9.89*10^-7. i hope this is right.
the rest of the question is a problem. i am lost. the only equations i can find are Dsin(theta) =nlambda (given by my proff) and Dsin(theta)= lambda/2. i know that i can't just use either of these equations on their own, but i am baffled as to what i should use. I'm not looking for anyone to pretty much do the question, i just need a nudge in the right direction and hopefully a simple explanation as to what is actually going on in this situation, and what the question is asking. thanks