Physics · A-Level · AQA · AQA A-level Physics (7408) · Specification point · 3.12.2.3 · Turning points in physics (A-level only) · Wave-particle duality (A-level only)
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3.12.2.3 Electromagnetic waves (A-level only)
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Nature of electromagnetic waves. Maxwell’s formula for the speed of electromagnetic waves in a vacuum |
where μ₀ is the permeability of free space and ε₀ is the permittivity of free space.
Students should appreciate that ε₀ relates to the electric field strength due to a charged object in free space and μ₀ relates to the magnetic flux density due to a current-carrying wire in free space.
Hertz’s discovery of radio waves including measurements of the speed of radio waves.
Fizeau’s determination of the speed of light and its implications.