WJEC A-Level Physics (Wales) · WJEC A430QS
2.7 Photons
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Photons
- A scientist is investigating the photoelectric effect using a clean zinc metal surface. Wh… (5 marks, Explain)
- A solar cell is illuminated with ultraviolet light of a certain frequency. Electrons are r… (5 marks, Explain)
- A student shines a beam of red light onto a metal surface. No electrons are emitted. The s… (5 marks, Explain)
- Explain why increasing the frequency of light shone onto a metal surface causes electrons … (5 marks, Explain)
- A student is investigating the emission of light from a LED (light-emitting diode). The st… (5 marks, Explain)