Physics nature of light practice questions

Original prompts for models of light, evidence and explanation.

Physics explanation pattern

State the model or principle, apply it to the scenario, then explain the observed outcome. Evidence matters.

Question 1 — 5 marks

Explain how the photoelectric effect provides evidence for the particle model of light.

Question 2 — 6 marks

Compare how wave and particle models explain different behaviours of light.

Question 3

A student increases light intensity but observes no electron emission below a threshold frequency. Explain the result.

Do not simply name an experiment. Explain how the observation supports or challenges a model.