Physics (AS & A Level) · May / June 2025 · Paper 14 · Question 24

A horizontal beam of light is incident normally on a polarising filter. The incident light is vertically polarised and has an intensity of 24 W m⁻². The direction of the transmission axis of the filter is at an angle of 30° to the vertical. What is the intensity of the light in the transmitted beam?

1. A18 W m⁻²
2. B21 W m⁻²
3. C28 W m⁻²
4. D32 W m⁻²

As printed in the paper