(a(i))[1]
State the name of line X in Fig. 6.1.
(a(ii))[1]
State what angle Y in Fig. 6.1 is called.
(a(iii))[1]
A student shifts the light ray and doubles the size of angle Y. State the effect this has on angle Z.
(b(i))[1]
State what the points labelled F in Fig. 6.2 are called.
(b(ii))[2]
Describe the properties of image I.