(a(i))[3]
On Fig. 8.1, finish the ray diagram to show how the lens converges the light.
(a(ii))[1]
Which distance on Fig. 8.1 gives a focal length of the lens? Tick one box: C–$f_2$, $f_1$–$f_2$, $f_2$–Y.
(b(i))[1]
State the name of the angle of incidence marked z.
(b(ii))[2]
Extend the light ray’s path until it emerges from the block.