Answer to Question #218575 in Quantum Mechanics for shakes

Question #218575

In early version of double slit experiment discussed,carnal and mlynek use helium atoms ( from reservoir maintained at 295k) that exit the nozzle after expansion with wavelength = 0.56 A (a) what is the speed of the helium atoms


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Expert's answer
2021-07-19T09:50:58-0400

E1=E2+E3,E_1=E_2+E_3,

mv22=hcλ+3kT2,\frac{mv^2}{2}=\frac{hc}{\lambda}+\frac{3kT}2,

v=2hc+3kλTmλ,v=\sqrt{\frac{2hc+3k\lambda T}{m\lambda}},

v=1.034106 ms.v=1.034\cdot 10^6~\frac ms.


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