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Question 18M.3.SL.TZ1.11a.ii

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Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.3.SL.TZ1.11a.ii
Level SL Paper 3 Time zone TZ1
Command term Show that Question number a.ii Adapted from N/A
a.ii.
[Maximum mark: 2]
18M.3.SL.TZ1.11a.ii

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

(a.ii)

Show that the temperature of star X is approximately 10 000 K.

[2]

Markscheme

peak wavelength: 290 ± 10 «nm»

T =  2.9 × 10 − 3 290 × 10 − 9 = «10 000 ± 400 K»

 

Substitution in equation must be seen.

Allow ECF from MP1.

[2 marks][

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