The electron speed is 0.8 s. Find the de Broglie wavelength of the electrons.

To find the value of the de Broglie wavelength, you must use the formula: λ = h / (me * V).
Constants and variables: h – Planck’s constant (h = 6.62607 * 10 ^ -34 J * s); me is the mass of an electron (me = 9.1 * 10 ^ -31 kg); V is the speed of electrons (V = 0.8 * C, where C is the speed of the light wave (C = 3 * 10 ^ 8 m / s)).
Let’s perform the calculation: λ = h / (me * V) = 6.62607 * 10 ^ -34 / (9.1 * 10 ^ -31 * 0.8 * 3 * 10 ^ 8) = 3.03 * 10 ^ – 12 m.
Answer: The de Broglie wavelength, according to the calculation, is 3.03 * 10 ^ -12 m.