Physics GCSE
wave speed in a vacuum
What wave speed in a vacuum means in Physics GCSE, as defined for AQA.
Definition of wave speed in a vacuum
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Reference: AQA
Every colour travels at the same speed in a vacuum, about 3 × 10⁸ m/s, so wave speed = frequency × wavelength fixes the frequency band once the wavelength band is known.
Topics that use wave speed in a vacuum
- Visible light (physics only) (AQA GCSE)
Related terms
- absorption
- colour filters
- diffuse reflection
- frequency and wavelength
- heating by absorbed light
- law of reflection
- opaque surfaces
- selective reflection
Using wave speed in a vacuum in the exam
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