DP Physics (first assessment 2025)

Question 22N.1A.SL.TZ0.30

Date	November 2022	Marks available	[Maximum mark: 1]	Reference code	22N.1A.SL.TZ0.30
Level	SL	Paper	1A	Time zone	TZ0
Command term		Question number	30	Adapted from	N/A

30.

[Maximum mark: 1]

22N.1A.SL.TZ0.30

Planet $X$ and planet $Y$ both emit radiation as black bodies. Planet $Y$ has twice the surface temperature and one third of the radius of planet $X$ .

What is $\frac{power radiated by planet X}{power radiated by planet Y}$ ?

A. $\frac{9}{16}$

B. $\frac{3}{4}$

C. $\frac{4}{3}$

D. $\frac{16}{9}$

[1]

Markscheme

Syllabus sections

B. The particulate nature of matter

B. The particulate nature of matter » B.1 Thermal energy transfers

Question 22N.1A.SL.TZ0.30

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