Chapter 5: Quantum Physics and the Photoelectric Effect

A-level PhysicsModule 4: Electrons, Waves & Photons8 topicsHigher

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Module 4: Electrons, Waves and Photons: Quantum Physics and the Photoelectric Effect - Authored Long Answer Questions

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4 questions25 marks37.5 min

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6 marksdescribestandardOCR A

For Quantum Physics and the Photoelectric Effect, describe how photon energy and photoelectron emission applies to ultraviolet light incident on zinc.

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6 markscalculatehardOCR A

Using ultraviolet light incident on zinc, calculate a relevant OCR A Quantum Physics and the Photoelectric Effect quantity and explain the physical or chemical meaning of the answer. Show equation, substitution, answer and unit.

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7 marksexplainhardOCR A

Quantum Physics and the Photoelectric Effect - data from: ultraviolet light incident on zinc

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Maximum kinetic energy of photoelectrons is zero at the threshold frequency f0 about 4.0 x 10^14 Hz. Above f0, KE increases linearly with frequency. Gradient = h/e, allowing Planck's constant to be determined from the graph.

The graph for Quantum Physics and the Photoelectric Effect shows data from ultraviolet light incident on zinc. Explain the pattern using the data and relevant physics principles.

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6 marksevaluatestandardOCR A

In ultraviolet light incident on zinc, evaluate the experimental method or model assumptions used when applying photon energy and photoelectron emission.

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4. Superposition, Interference and Stationary Waves

End of Module 4: Electrons, Waves & Photons

Key learning objectives

Understand the key principles behind Quantum Physics and the Photoelectric Effect.
Apply these ideas to exam-style questions.
Recall the essential definitions and key terms.