An Electron Is Moving with the Speed Of $1780 \mathrm {~m} / \mathrm { s }$

question 122

Multiple Choice

An electron is moving with the speed of $1780 \mathrm {~m} / \mathrm { s }$ . What is its de Broglie wavelength? $\left( m _ { \text {electron } } = \right.$ $\left. 9.11 \times 10 ^ { - 31 } \mathrm {~kg} , h = 6.626 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s } \right)$

• A) \(409 \mathrm {~nm}\)
• B) \(502 \mathrm {~nm}\)
• C) \(302 \mathrm {~nm}\)
• D) \(205 \mathrm {~nm}\)
• E) \(420 \mathrm {~nm}\)

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