Find the de Broglie wavelength of an electron with KE:(adsbygoogle = window.adsbygoogle || []).push({});

a]10eV

b]1KeV

c]1MeV

d]100MeV

Formulae:

Relativistic

[tex]\lambda = \frac{h}{\sqrt{{(E/c)}^2 - m_0^2c^4}}[/tex]

Non-relativistic

[tex]\lambda = \frac{h}{\sqrt{2mE}}[/tex]

I am wondering for which case(s) should I apply the relativistic or the non-relativistic equation given that the BE of electron is 0.511MeV.

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# Homework Help: Find the de Broglie wavelength of an electron

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