25Wave Properties Wave BehaviourHard1 mark
Plane polarised light of intensity I is incident normally on a set of polarising filters.
The transmission axis of the first filter is at to the plane of polarisation of the incident light.
The transmission axis of each successive filter is at to the transmission axis of the previous filter.
The intensity of the light emerging from the final filter is 0.24I.
How many polarising filters are in the set?