Electron Diffraction

[meefz]

HeyHey,

I was wondering if anyone can explain how the electron diffraction pattern is formed, and why its similar to an x-ray diffraction pattern.  :idiot2:
thanksss

[Whatlol]

The extent of diffraction depends on the ratio of wavelength to the inter atomic spacing of the crystals (thats what is usually used for these experiments in the practice exam questions)

The patterns are only the same if the wavelengths of the electrons and x-rays are identical as this means there will be a very similar extent of diffraction (as they both encounter the same inter-atomic spacing).

Also you can assume the momentum of x-rays and electrons are the same, by looking at lambda = h/ momentum.

Dont assume they have the same energy.

Hope that helps, if you want something more insightful, hopefully someone else can provide that information.

[meefz]

hey thanks a whole heap man.
Really cleared things up

[Whatlol]

no probs.
gl for exams