(a(i))[1]
With the details shown in Fig. 7.1, state the angle of refraction for the red light ray passing from air into the glass block.
(a(ii))[1]
Using the information in Fig. 7.1, state the name given to line X.
(b(i))[2]
On Fig. 7.2, extend these two rays to indicate the position of the image formed by the lens.
(b(ii))[1]
Draw the image of OX formed by the lens.