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Question 20N.3.SL.TZ0.17d

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Date November 2020 Marks available [Maximum mark: 3] Reference code 20N.3.SL.TZ0.17d
Level SL Paper 3 Time zone TZ0
Command term Explain Question number d Adapted from N/A
d.
[Maximum mark: 3]
20N.3.SL.TZ0.17d

The data for the star Eta Aquilae A are given in the table.

L⊙ is the luminosity of the Sun and M⊙ is the mass of the Sun.

(d)

Eta Aquilae A is a Cepheid variable. Explain why the brightness of Eta Aquilae A varies.

[3]

Markscheme

reference to change in size ✓
reference to change in temperature ✓
reference to periodicity of the process ✓
reference to transparency / opaqueness ✓

 

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