Problem 1 (Electron Beam Diffraction/De Broglie Wavelength): A beam of 125-eV electrons is scattered from a...
Problem 1 (Electron Beam Diffraction/De Broglie Wavelength):
A beam of 125-eV electrons is scattered from a crystal in an X-ray diffraction experiment, and a first- order peak is observed an angle of 38 from the normal to surface of the crystal. What is the spacing between planes in the diffracting crystal?
can you please show steps in solving this problem
Homework Answers
energy = hc/λ
125*1.6*10^-19 = 6.626*10^-34*3*10^8 / λ
λ = 9.94*10^-9 m
using the eqation
2d sin θ = nλ
2*d* sin 38 = 1*9.94*10^-9
d = 8.07*10^-9 m
so the spacing is 8.07 nm
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