February/March 2026 Paper 12

2026 · 40 questions · 40 parts · 40 marks

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27Wave Properties Wave BehaviourMedium1 mark
A beam of vertically polarised light of intensity is incident normally on a polarising filter. The transmission axis of the filter is at an angle of to the vertical. The transmitted light beam is then incident normally on a second polarising filter. The transmission axis of the second filter is perpendicular to the vertical as shown.
a vertically polarised light beam passing through two polarising filters in sequence: the first filter's transmission axis is at 60 degrees to the vertical, and the second filter's transmission axis is perpendicular to the vertical (horizontal), with the transmitted beam continuing on afterwards
The intensity of the light beam that emerges from the second filter is . What is the ratio ?