DP Physics (first assessment 2025)

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Question SPM.1A.SL.TZ0.9

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Date May Specimen-2023 Marks available [Maximum mark: 1] Reference code SPM.1A.SL.TZ0.9
Level SL Paper 1A Time zone TZ0
Command term Question number 9 Adapted from N/A
9.
[Maximum mark: 1]
SPM.1A.SL.TZ0.9

Star X has a luminosity L and an apparent brightness b. Star X is at a distance d from Earth.

Star Y has the same apparent brightness as X but is four times more luminous.

What is the distance of Star Y from Earth?


A.  4d

B.  2d

C.  d2

D.  d4

[1]

Markscheme

B

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