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The Doppler Effect
When something that emits waves moves either towards you or away from you, the wavelengths and frequencies of the source appear different to when the source is stationary.
In GCSE physics curriculum, there are two types of shift you need to remember:
Blue shift = When something is closer to you, the wavelength seems longer and the frequency appears higher.
Red shift = When something is moving away from you, the wavelength seems shorter and the frequency appears lower.
The Doppler effect can appear in longitudinal waves (e.g. sound) and transverse waves (light/EM spectrum) in GCSE physics.
It appears difficult, but really there's not much to learn!
End of this topic!
Drafted by Gina (Physics)