3.3.3 — Know that the speed of electromagnetic 8 waves in a vacuum is 3.0 × 10 m / s and is approximately the same in air continued www.cambridgeinternational.org/igcse 25 Subject content

3.3.3 — Know that the speed of electromagnetic 8 waves in a vacuum is 3.0 × 10 m / s and is approximately the same in air continued www.cambridgeinternational.org/igcse 25 Subject content