CSEC Physics · 1990 · Paper 2 · Question 1(c)(ii)

Plane electromagnetic wavefronts travel in air at 3.0 x 10^8 m s^-1 and hit a plane refracting surface at an angle of 30°. The wavelength in air is 4.0 x 10^-7 m and velocity in the second medium is 2.2 x 10^8 m s^-1.

Calculate the wavelength of the waves in the second medium and the angle of refraction.

This question uses a figure or table from the paper — you'll see it when you practise.