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

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) $420 \mathrm {~nm}$