DP Physics (first assessment 2025)

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Question 22M.1A.SL.TZ1.14

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1A.SL.TZ1.14
Level SL Paper 1A Time zone TZ1
Command term Question number 14 Adapted from N/A
14.
[Maximum mark: 1]
22M.1A.SL.TZ1.14

A light source of power P is observed from a distance d. The power of the source is then halved.

At what distance from the source will the intensity be the same as before?

A.  d2

B.  d2

C.  d4

D.  d8

[1]

Markscheme

A

Examiners report

SL candidate responses were divided across options A, B and C, and so this question would be a useful teaching tool for exploring the relationship between power, intensity and distance.

Syllabus sections