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18 April, 13:38

A 1.0 kg object moving at 4.5 m/s has a wavelength of:

A) 1.5 * 10-34 m

B) 2.9 * 10-33 m

C) 7.4 * 10-35 m

D) 1.4 * 10-34 m

E) 2.9 * 10-34 m

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Answers (1)
  1. 18 April, 13:49
    0
    By wave particle duality.

    Wavelength, λ = h / mv

    where h = Planck's constant = 6.63 * 10⁻³⁴ Js, m = mass in kg, v = velocity in m/s.

    m = 1kg, v = 4.5 m/s

    λ = h / mv

    λ = (6.63 * 10⁻³⁴) / (1*4.5)

    λ ≈ 1.473 * 10⁻³⁴ m

    Option D.
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