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Indian Navy SSR (Sailor) Dual Nature of Radiation and Matter — practice questions

Explore 1 free Dual Nature of Radiation and Matter questions in Indian Navy SSR (Sailor) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Heisenberg uncertainty: for an electron in atom (Δx ~ 10⁻¹⁰ m), minimum momentum uncertainty:Read the answer and worked solution →

Worked practice questions

Heisenberg uncertainty: for an electron in atom (Δx ~ 10⁻¹⁰ m), minimum momentum uncertainty:

  1. Zero
  2. Always 10⁻³⁴
  3. Cannot apply
  4. Δp ≥ ħ/2 / Δx ≈ 5 × 10⁻²⁵ kg m/s
Show answer and solution

Correct answer: D. Δp ≥ ħ/2 / Δx ≈ 5 × 10⁻²⁵ kg m/s

Δp ≥ ħ/(2 Δx) = 1.05 × 10⁻³⁴ / (2 × 10⁻¹⁰) ≈ 5.3 × 10⁻²⁵ kg m/s. Corresponds to velocity uncertainty ~5.8 × 10⁵ m/s — substantial, confirming that classical orbits make no sense at atomic scale.

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