Question

electrons with wavelength 12cm are used for electron diffraction what is the velocity of this electron​

Answer 1

Answer:

electron diffraction refers to the wave nature of electrons. however, from a technical or practical point of view, it may be regarded as a technique used to study matter by firing electrons at a sample and observing the resulting interference pattern. this phenomenon is commonly known as wave–particle duality, which states that a particle of matter (in this case the incident electron) can be described as a wave. for this reason, an electron can be regarded as a wave much like sound or water waves. this technique is similar to x-ray and neutron diffraction.

Explanation:

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Answer 2

Answer:

The de Broglie relations associate a wavelength λ = h/p = h/√(2mE) with each particle of momentum p. For an electron which has been accelerated through a potential difference of 5 kV and therefore has a kinetic energy of 5000 eV = 8*10-16 J, this wavelength is λ = 1.74*10-11 m.