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