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What the Doppler effect tells us

What the Doppler effect tells us

Observed spectra compared with a laboratory spectrum, showing redshift to longer wavelength and blueshift to shorter wavelength The Doppler effect for light is the change in observed wavelength and frequency caused by relative motion between a source and an observer. Astronomers detect it by comparing known absorption lines from a laboratory spectrum with the same lines from a star or galaxy.

Doppler effect (A-level only) Lesson

  1. A Level
  2. /Physics
  3. /Doppler effect (A-level only)

Step-by-step lessons on AQA A Level Physics Doppler effect (A-level only). Each one builds up to exam-style questions. Physics is one of the most mathematically demanding A Levels -- at least 40% of the marks require maths skills at Level 2 (GCSE) standard or above, so build calculation and graph-handling fluency alongside the conceptual content from the start.

Lessons