IB Physics SL B 1 17 Wiens Displacement Law Questions

Practise IB Physics SL B.1.17 by applying Wien's displacement law to connect spectral peak wavelength with the temperature and colour of stars.

Exam points

Apply Wien’s displacement law λmaxT = 2.9×10⁻³ m K to a black-body spectrum.
Infer black-body temperature from peak wavelength and interpret the inverse relationship using complete evidence and consistent units.

[Maximum number: 1]

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 SL B 1 17 Wiens Displacement Law Questions question 1 — IB Physics SL

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 SL B 1 17 Wiens Displacement Law Questions question 1