DP Physics (first assessment 2025)

Question 20N.1A.SL.TZ0.26

Date	November 2020	Marks available	[Maximum mark: 1]	Reference code	20N.1A.SL.TZ0.26
Level	SL	Paper	1A	Time zone	TZ0
Command term		Question number	26	Adapted from	N/A

26.

[Maximum mark: 1]

20N.1A.SL.TZ0.26

The average temperature of the surface of a planet is five times greater than the average temperature of the surface of its moon. The emissivities of the planet and the moon are the same. The average intensity radiated by the planet is $I$ . What is the average intensity radiated by its moon?

A. $\frac{I}{25}$

B. $\frac{I}{125}$

C. $\frac{I}{625}$

D. $\frac{I}{3125}$

[1]

Markscheme

Syllabus sections

B. The particulate nature of matter » B.2 Greenhouse effect

Question 20N.1A.SL.TZ0.26

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