DP Physics (first assessment 2025)

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Question 19M.2.SL.TZ1.a.ii

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Date May 2019 Marks available [Maximum mark: 2] Reference code 19M.2.SL.TZ1.a.ii
Level SL Paper 2 Time zone TZ1
Command term Outline Question number a.ii Adapted from N/A
a.ii.
[Maximum mark: 2]
19M.2.SL.TZ1.a.ii

Another black body is on the Moon’s surface at point B.

Outline, without calculation, why the aximum temperature of the black body at point B is less than at point A.

[2]

Markscheme

energy/Power/Intensity lower at B ✔

connection made between energy/power/intensity and temperature of blackbody ✔

Examiners report

This is question is another example of candidates not thinking beyond the obvious in the question. Many simply said that point B is farther away, or that it is at an angle. Some used vague terms like “the sunlight is more spread out” rather than using proper physics terms. Few candidates connected the lower intensity at B with the lower temperature of the blackbody.

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