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What is the (a) momentum, (b) speed, and (c) de Broglie wavelength of an electron with kinetic energy of 120 eV.

What is the (a) momentum, (b) speed, and (c) de Broglie wavelength of an electron with kinetic energy of 120 eV.

Grade:11

1 Answers

Apoorva Arora IIT Roorkee
askIITians Faculty 181 Points
9 years ago
KE= 120 eV
P=\sqrt{2mKE}
=5.9\times 10^{-24}
P=mv
so v=6.5\times 10^{6}m/s
\lambda =\frac{h}{P}
= 1.123 angstrom
Thanks and Regards
Apoorva Arora
IIT Roorkee
askIITians Faculty

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