#4.4.2a
electromagnetic spectrum; properties of electromagnetic waves
#4.4.2b
orders of magnitude of wavelengths of the principal radiations from radio waves to gamma rays
#4.4.2c
plane polarised waves; polarisation of electromagnetic waves
Learners will be expected to know about polarising filters for light and metal grilles for microwaves in demonstrating polarisation.
#4.4.2d
(i) refraction of light; refractive index;
\(n = \dfrac{c}{v} \);
\(n\sin{θ} = \text{constant} \) at a boundary where θ is the angle to the normal
(ii) techniques and procedures used to investigate refraction and total internal reflection of light using ray boxes, including transparent rectangular and semi-circular blocks
PAG6
#4.4.2e
critical angle; \(\sin(C) = \dfrac{1}{n} \);
total internal reflection for light.