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Edexcel A-Level Physics Doppler Effect

Review the Doppler effect in Edexcel A-Level Physics through wavelength shifts, relative motion, rotating stars and redshift or blueshift evidence.

Syllabus
Pearson Edexcel International Advanced Subsidiary/Advanced Level
Course
Physics XPH11/YPH11
Level
A2

Exam points

  • explain redshift or blueshift from source motion relative to an observer or detector
  • link changing stellar wavelength to orbital motion or rotating points on a star surface
  • identify motion toward or away from Earth from shifted absorption-line wavelengths

5.6.169 - Doppler effect question 1

[Maximum number: 3]

A massive planet orbits the red dwarf star Gliese 876. The planet was discovered after wavelength shifts in spectral lines were seen in the light received from the star.

Explain how a massive planet orbiting a star can cause a change in the wavelength of light received from the star.

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