Planck's constant is 6.6 * 10^-34 J·s and the electron mass is 9.1 * 10^-31 kg.The de Broglie wavelength of an electron whose speed is 2.0 * 10⁷ m/s is A)2.8 * 10^-10 m. B)3.6 * 10^-10 m. C)3.6 * 10^-11 m. D)2.8 * 10¹⁰ m.

Question

Quizplus · Accepted Answer

The de Broglie wavelength can be calculated using the equation

λ = h/mv

where λ is the de Broglie wavelength, h is Planck's constant, m is the mass of the electron, and v is its velocity.

Substituting the given values, we get

λ = (6.6 x 10^-34 J·s)/(9.1 x 10^-31 kg)(2.0 x 10^7 m/s)

λ = 3.6 x 10^-11 m

Therefore, the correct answer is C, 3.6 x 10^-11 m.

Planck's Constant Is 6