7.5 Polarisation

2 of 2 objectives have lessons · 0 studied · 0 secure

Lessons

Polarisation and transverse wavesWhat it means for a wave to be plane-polarised, and why only transverse waves can be polarised. 5 min, not started
Malus's lawCalculate the intensity transmitted through one analyser, or a series of filters, using I = I₀ cos²θ. 6 min, not started
Polarising filters in series and in useHow filters select a plane, why a third filter can let light through crossed filters, and where polarisation matters in real devices. 6 min, not started

Syllabus objectives

2 objectives

What Cambridge says you should be able to do, in our words. Codes are the topic number plus the objective’s position.

7.5.1

Understand that polarisation is a phenomenon associated with transverse waves.

Taught in: Polarising filters in series and in use, Polarisation and transverse waves · 12 questions

7.5.2

Recall Malus’s law (I = I₀ cos²θ) and use it to calculate the intensity of a plane-polarised electromagnetic wave transmitted through one polarising filter or a series of them.

Calculations of the effect of a polarising filter on the intensity of an unpolarised wave are not required.

Taught in: Polarising filters in series and in use, Malus's law · 11 questions