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A source of light is viewed through a polarising filter, as shown in photograph 1 - Edexcel - A-Level Physics - Question 2 - 2023 - Paper 2
Question 2
A source of light is viewed through a polarising filter, as shown in photograph 1. The filter is rotated through an angle and then viewed, as shown in photograph 2. ... show full transcript
Worked Solution & Example Answer:A source of light is viewed through a polarising filter, as shown in photograph 1 - Edexcel - A-Level Physics - Question 2 - 2023 - Paper 2
Step 1
Light emitted by source is polarised; Angle of rotation / radians is $ rac{ heta}{2}$
Answer
The light emitted by the source is polarised when it passes through a polarising filter. When the filter is in alignment with the light's plane of polarisation, the filter will transmit the light without obstruction. Therefore, if the light source is identified as polarised and the filter is rotated through an angle of rac{ heta}{2}, the light remains polarised, resulting in options A being the correct choice.