a. i. Explain what is meant by the waveparticle duality of electromagnetic radiation. ii. Explain how the

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a. i. Explain what is meant by the wave–particle duality of electromagnetic radiation.
ii. Explain how the photoelectric effect gives evidence for this phenomenon.
The diagram shows the maximum kinetic energy E of the emitted photoelectrons as the frequency f of the incident radiation on a sodium plate is varied.

b. Explain why there are no photoelectrons emitted when the frequency of the incident light is less than 5.6 × 1014 Hz.
c. Determine the work function for sodium. Explain your answer.
d. Use the graph to determine the value of the Planck constant. Explain your answer.

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Cambridge International AS And A Level Physics Coursebook

ISBN: 9781108859035

3rd Edition

Authors: David Sang, Graham Jones, Gurinder Chadha, Richard Woodside

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