What this tests
Syllabus point 3.3 — Electromagnetic spectrum, in Waves. Difficulty medium (estimated from the question's demands, not a Cambridge rating).
Also set in
The same question, as Cambridge printed it in other papers.
Cambridge IGCSE Physics 0625 · 3.3 Electromagnetic spectrum
November 2025 · Paper 21 · Question 19
One real Cambridge question from Waves, with the official answer. Cambridge has printed this question 2 times.