IB Physics HL B 1 17 Wiens Displacement Law Questions

Practise IB Physics HL B.1.17 by combining Wien's law, redshift scaling and spectra to analyse stellar and cosmic microwave background temperatures.

Exam points

Use Wien's law with redshift scaling to relate CMB temperature to the cosmic scale factor.
Combine peak wavelength, Stefan–Boltzmann data and spectra to compare temperatures of stars and compact objects.

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Study B.1.17—Wien’s displacement law conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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Star A is a main sequence star.

The data for Star A and the Sun are given in a table.

Table for Question IB Physics HL B 1 17 Wiens Displacement Law Questions question 1 — IB Physics HL

Show that the peak wavelength emitted from Star A is about 560 nm .

$\lambda_{\text {max }}=\frac{2.9 \times 10^{-3}}{5200}=5.58 \times 10^{-7} \mathrm{~m}$ OR $558 \mathrm{~nm}$

Must see full substitution OR answer to 3 (or more) significant
figures.

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IB Physics HL B 1 17 Wiens Displacement Law Questions question 1