PART A: Find the de Broglie wavelength for an electron moving at a speed of 1.00

Question

PART A: Find the de Broglie wavelength for an electron moving at a speed of 1.00 * 10^6 m/s . (Note that this speed is low enough that the classical momentum formula p=mv is still valid.) Recall that the mass of an electron is9.11 X 10^-31 , and Planck's constant is 6.626 X 10^-34 .

PART B: Find the de Broglie wavelength of a baseball pitched at a speed of 41.0m/s . Assume that the mass of the baseball is .143 kg .

Explanation / Answer

We know that lambda = h / m v ==> = 6.626 x 10^-34 / 9.11 x 10^-31 * 1.00 x 10^6 = 0.727 x 10^-9 m = 0.727 nm b) lambda = h / m v ==> = 6.626 x 10^-34 / 0.143 * 41 = 1.130 x 10^-34 m

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