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Question 18M.3.SL.TZ2.c.ii

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.3.SL.TZ2.c.ii
Level SL Paper 3 Time zone TZ2
Command term Outline Question number c.ii Adapted from N/A
c.ii.
[Maximum mark: 1]
18M.3.SL.TZ2.c.ii

The following data apply to the star Gacrux.

Radius = 58.5 × 10 9  m Temperature = 3600  K Distance = 88  ly

The distance to Gacrux can be determined using stellar parallax. Outline why this method is not suitable for all stars.

[1]

Markscheme

if the star is too far then the parallax angle is too small to be measured

OR

stellar parallax is limited to closer stars

 

OWTTE

[1 mark]

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