A-Level UK (AQA, Edexcel, OCR) · Physics

Quantum and atomic physics

6 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 6 questions

  1. What is the energy of a photon of wavelength 500 nm? (h = 6.63 x 10^-34 J s, c = 3.00 x 10^8 m/s)
  2. A metal has a work function of 2.3 eV. Light of photon energy 3.1 eV falls on it. What is the maximum kinetic energy of the emitted electrons?
  3. An electron moves at 1.0 x 10^6 m/s. What is its de Broglie wavelength? (m = 9.11 x 10^-31 kg, h = 6.63 x 10^-34 J s)
  4. In a hydrogen atom, an electron falls from the -1.51 eV level to the -3.40 eV level. What is the energy of the emitted photon?
  5. What do electron diffraction patterns provide evidence for?
  6. A metal has a work function of 2.3 eV. What is its threshold frequency? (h = 6.63 x 10^-34 J s, 1 eV = 1.60 x 10^-19 J)

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