(a)[2]
State which radiation occupies each of the regions labelled A, B, C and D in Fig. 6.1.
(b(i))[2]
Calculate the angle of refraction in the glass at S.
(b(ii))[2]
On Fig. 6.2, show the refracted ray at face XY and the ray that leaves the prism from face XZ. Call this ray R.
(b(iii))[2]
On Fig. 6.2, add the path of this ray inside the prism and as it leaves the prism. Label it B.