(a)[3]
Describe what happens to the light after it emerges from the lens.
(b)[1]
On Fig. 7.1, place an F to show each of the lens's two principal focuses.
(c(i))[3]
Using the diagram in Fig. 7.1, determine where the image I of N is formed and add image I to the diagram.
(c(ii))[1]
State and explain if I is a real image or a virtual image.
(c(iii))[1]
State the name given to a lens when it is being used in this way.