In a Computer Monitor, Electrons Approach the Screen at 1

Multiple Choice

In a computer monitor, electrons approach the screen at 1.20 × 10⁸ m/s. What is the de Broglie wavelength of these electrons? Note: the mass of electrons is 9.109 × 10^-31 kg; and use the relativistic momentum in your calculation.

A) 4.31 × 10^-12 m
B) 5.56 × 10^-12 m
C) 6.07 × 10^-12 m
D) 6.62 × 10^-12 m
E) 7.85 × 10^-12 m