DP Physics (first assessment 2025)

Question 21M.1A.SL.TZ2.29

Date	May 2021	Marks available	[Maximum mark: 1]	Reference code	21M.1A.SL.TZ2.29
Level	SL	Paper	1A	Time zone	TZ2
Command term		Question number	29	Adapted from	N/A

29.

[Maximum mark: 1]

21M.1A.SL.TZ2.29

A black-body radiator emits a peak wavelength of $λ_{max}$ and a maximum power of $P_{0}$ . The peak wavelength emitted by a second black-body radiator with the same surface area is $2 λ_{max}$ . What is the total power of the second black-body radiator?

A. $\frac{1}{16} P_{0}$

B. $\frac{1}{2} P_{0}$

C. $2 P_{0}$

D. $16 P_{0}$

[1]

Markscheme

Syllabus sections

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

Question 21M.1A.SL.TZ2.29

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