(a(i))[1]
State which of a, b or c represents the angle of incidence.
(a(ii))[1]
State the name of the line labelled X.
(a(iii))[2]
The mirror sends the ray of light back. On Fig. 8.1, draw the reflected ray.
(b(i))[2]
Fig. 8.3 shows another ray of red light entering the semicircular glass block at 60^{\circ}. Carry the path of this ray through the glass block and out into the air.
(b(ii))[2]
Carry the path of this ray through the glass block and out into the air.