Physics (AS & A Level) · May / June 2023 · Paper 12 · Question 24

A vertically polarised beam of light of intensity I_0 is incident normally on a polarising filter. The transmission axis of the filter is at 45° to the vertical. The beam of light transmitted by this filter is then incident normally on a second filter. The transmission axis of the second filter is horizontal. What is the intensity of the beam of light after transmission through the second filter?

1. A0
2. B\frac{1}{4} I_0
3. C\frac{1}{2} I_0
4. DI_0

As printed in the paper