If the De Broglie Wavelength of an Electron Is 2 $\left( m \text { electron } = 9.11 \times 10 ^ { - 31 } \mathrm {~kg} , \right.$

If the de Broglie wavelength of an electron is 2.4 μm, what is the speed of the electron? $\left( m \text { electron } = 9.11 \times 10 ^ { - 31 } \mathrm {~kg} , \right.$ $h = 6.626 \times 10^{ - 34} \mathrm {~J} \cdot \mathrm { s } )$

A) 3.0 × 10² m/s
B) 2.5 × 10⁵ m/s
C) 1.7 × 10³ m/s
D) 8.3 × 10⁶ m/s

Correct Answer:

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