Practice question

MCQ

Question

What is the de Broglie wavelength of an electron moving with a velocity of 2.0 × 10⁶ m s⁻¹? (h = 6.626 × 10⁻³⁴ J s, mₑ = 9.1 × 10⁻³¹ kg)

Options

Choose one · Correct answer highlighted

1.82 × 10⁻¹⁰ m 3.64 × 10⁻¹⁰ m Correct 5.46 × 10⁻¹⁰ m 7.28 × 10⁻¹⁰ m

Explanation

λ = h/(mv) = 3.64×10⁻¹⁰ m.

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