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Question 18M.3.SL.TZ1.11b.i

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.3.SL.TZ1.11b.i
Level SL Paper 3 Time zone TZ1
Command term Write down Question number b.i Adapted from N/A
b.i.
[Maximum mark: 1]
18M.3.SL.TZ1.11b.i

The graph shows the observed spectrum from star X.

M18/4/PHYSI/SP3/ENG/TZ1/11_01

The second graph shows the hydrogen emission spectrum in the visible range.

M18/4/PHYSI/SP3/ENG/TZ1/11_02

The following diagram shows the main sequence.

M18/4/PHYSI/SP3/ENG/TZ1/11.b

(b.i)

Write down the luminosity of star X (LX) in terms of the luminosity of the Sun (Ls).

[1]

Markscheme

35 ± 5Ls

[1 mark]

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