Physics (AS & A Level) · Oct / Nov 2023 · Paper 13 · Question 24

A vertically polarised electromagnetic wave of intensity I0 is incident normally on a polarising filter. The transmission axis of the filter is at an angle of 30° to the vertical. The transmitted wave from the first filter is then incident normally on a second polarising filter. The transmission axis of this filter is at an angle of 90° to the vertical. [diagram showing two polarising filters with transmission axes, vertically polarised electromagnetic wave incident, 30° angle] What is the intensity of the wave after passing through the second filter?

1. A0
2. B0.063 I0
3. C0.19 I0
4. D0.56 I0

As printed in the paper