DP Physics (first assessment 2025)

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Question 19M.2.SL.TZ1.6a.i

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Date May 2019 Marks available [Maximum mark: 2] Reference code 19M.2.SL.TZ1.6a.i
Level SL Paper 2 Time zone TZ1
Command term Show that Question number a.i Adapted from N/A
a.i.
[Maximum mark: 2]
19M.2.SL.TZ1.6a.i
(a.i)

A black body is on the Moon’s surface at point A. Show that the maximum temperature that this body can reach is 400 K. Assume that the Earth and the Moon are the same distance from the Sun.

[2]

Markscheme

T = ( 1360 σ ) 0.25   ✔

390 «K» ✔

Must see 1360 (from data booklet) used for MP1.

Must see at least 2 s.f.

Examiners report

Many candidates struggled with this question. A significant portion attempted to apply Wein’s Law and simply stated that a particular wavelength was the peak and then used that to determine the temperature. Some did use the solar constant from the data booklet and were able to calculate the correct temperature. As part of their preparation for the exam candidates should thoroughly review the data booklet and be aware of what constants are given there. As with all “show that” questions candidates should be reminded to include an unrounded answer.

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