2024TrialMultiple choice

Q16

1 mark

Question

Two stars, A and B, are equally bright as seen from the Earth. Stars A and B are $10$ and $15$ parsecs away from Earth respectively. One parsec $=3.26$ light years.

Which of the following statements about the luminosities of stars A and B ( $L_A$ and $L_B$ ) are correct?
A. $L_A=\frac{3}{2}L_B$
B. $L_A=\frac{2}{3}L_B$
C. $L_A=\frac{4}{9}L_B$
D. $L_A=\frac{9}{4}L_B$

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Syllabus alignment

Module 8 · From the Universe to the Atom

Origins of the ElementsUse stellar spectra and Hertzsprung-Russell diagrams to classify stars and infer their properties and evolution.

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