IB Physics SL B.1.17 Wien’s displacement law Question Bank

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 law to convert peak wavelength into black-body temperature or identify the radiation band.
Read spectra and HR-diagram scales to infer stellar temperature from peak position and logarithmic axes.

[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 B.1.17—Wien’s displacement law 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.

[1]

All question bank results loaded

B.1.17—Wien’s displacement law question 1