DP Physics (last assessment 2024)

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Question 22M.1.SL.TZ1.16

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1.SL.TZ1.16
Level SL Paper 1 Time zone TZ1
Command term Question number 16 Adapted from N/A
16.
[Maximum mark: 1]
22M.1.SL.TZ1.16

A beam of unpolarized light of intensity I0 is incident on a polarizing filter. The polarizing filter is rotated through an angle θ. What is the variation in the intensity I of the beam with angle θ after passing through the polarizing filter?

[1]

Markscheme

D

Examiners report

Option B was chosen most frequently among both HL and SL candidates. It seems likely that students selecting this answer were anticipating a question with two polarising filters where the second filter was rotated. Again, careful reading of the questions by candidates is necessary. A high discrimination index was observed for this question. This is a good conceptual question and would be useful in the teaching and/or revision of polarisation.

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