Planck's constant is h = 6.6 * 10^-34 Js and the electron mass is 9.1* 10^-31 kg.The de Broglie wavelength of an electron whose speed is 10⁸ m/s is A)5.9 * 10^-56 m. B)1.5 * 10^-19 m. C)7.3 * 10^-12 m. D)1.4 * 10¹¹ m.

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Quizplus · Accepted Answer

The de Broglie wavelength is calculated using the formula λ = h / (mv). Substituting the given values, λ = 6.6 * 10^-34 Js / (9.1 * 10^-31 kg * 10^8 m/s) = 7.3 * 10^-12 m.

Planck's Constant Is H = 6