What is the wavelength associated with electrons traveling at one one-hundredth the speed of light?

Question

Quizplus · Accepted Answer

The de Broglie wavelength, λ, is given by λ = h/p, where h is Planck's constant and p is the momentum. The momentum of an electron traveling at one one-hundredth the speed of light can be calculated as p = mv = (9.11 × 10^-31 kg)(3 × 10^7 m/s)/100 = 2.73 × 10^-25 kg m/s. Substituting this into the equation for λ, we get λ = h/p = (6.626 × 10^-34 J s)/(2.73 × 10^-25 kg m/s) = 0.243 nm. Therefore, the best choice is B.

What Is the Wavelength Associated with Electrons Traveling at One