What is the velocity of an electron with a de Broglie wavelength of 4.32 μm?
A)168 m/s
B)123 m/s
C)145 m/s
D)211 m/s

Question

Quizplus · Accepted Answer

The de Broglie wavelength of an electron is given by the equation λ = h/mv, where h is the Planck's constant, m is the mass of the electron, and v is its velocity. Solving this equation for v, we get v = h/(mλ). Substituting the given values, we get v = (6.626 x 10^-34 J s)/[(9.109 x 10^-31 kg) x (4.32 x 10^-6 m)] = 1.67 x 10^2 m/s, which is closest to choice A) 168 m/s.

What Is the Velocity of an Electron with a De