Eduqas A Level Physics
Eduqas A Level Physics 3.4 Photons Exam Questions
Free Eduqas A Level Physics exam questions on 3.4 Photons, with mark schemes. Covers the photoelectric effect, photon energy, energy levels and wave-particle duality.
3.4 Photons exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
StemUp mark scheme flashcards
A Level Physics Flashcards
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Pick your exam board, then test yourself with the questions on this page.
View flashcards
About Eduqas A Level Physics 3.4 Photons
This topic covers the particle nature of light.
What you need to know
- Photon energy E = hf.
- Photoelectric effect Work function and threshold frequency; Ek max = hf − φ.
- Energy levels Line spectra from electron transitions.
- De Broglie λ = h/p for particles.
Common mistakes in 3.4 Photons
- Saying intensity increases electron energy.
- Forgetting to convert eV to J.
- Confusing threshold frequency and work function.
Try three 3.4 Photons exam-style questions
1. Find the energy of a 500 nm photon. (1 mark)
Show the mark scheme answer
3.98 x 10⁻¹⁹ J.
2. Explain why below threshold frequency no electrons are emitted. (2 marks)
Show the mark scheme answer
One photon interacts with one electron (1); its energy hf is less than the work function (1).
3. State what electron diffraction shows. (1 mark)
Show the mark scheme answer
Particles have wave properties.
3.4 Photons FAQs
What does Photons cover?
Photon energy, the photoelectric effect, energy levels and wave-particle duality.
Which practical links here?
Determining the Planck constant using LEDs.
What is an electronvolt?
The energy gained by an electron through 1 V, 1.6 x 10⁻¹⁹ J.
Revise this topic with flashcards: A Level Physics Flashcards, with mark scheme answers for Anki and Quizlet.
