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IB Physics SL C.5.4 Spectral line shifts Question Bank

Practise IB Physics SL/HL C.5.4 by applying spectral line shifts concepts to exam-style physics questions.

Syllabus
First assessment 2025
Course
Physics SL
Level
SL

Exam points

  • identify the relevant physical quantity, model or diagram
  • apply the correct equation and units to the evidence
  • justify the result using conservation laws, fields or energy relationships

C.5.4—Spectral line shifts question 1

[Maximum number: 1]

The Hubble constant is 2.3×10−18 s−12.3 \times 10^{-18} \mathrm{~s}^{-1}.

Outline how observations of spectra from distant galaxies provide evidence that the universe is expanding.

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