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  • Similar to electron diffraction, neutron diffraction microscope is also used for the determination of the structure of molecules. If the wavelength used here is 800 pm, calculate the characteristic velocity associated with the neutron.

2.58: Similar to electron diffraction, a neutron diffraction microscope is also used for the determination of the structure of molecules. If the wavelength used here is 800 pm, calculate the characteristic velocity associated with the neutron.

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Given the wavelength of neutron: \lambda = 800\ pm

and the mass of neutron m =1.675\times10^{-27}kg

So, according to de -Broglie's equation,

\lambda = \frac{h}{mv}

Substituting the values in above equation:

800\times10^{-12} m = \frac{6.626\times10^{-34}Js}{(1.675\times10^{-27}kg)\times(v)}

\Rightarrow v = \frac{6.626\times10^{-34}Js}{(1.675\times10^{-27}kg)\times(800\times10^{-12}m)}

v= 4.94\times10^4 m/s

Posted by

Divya Prakash Singh

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