(a(i))[2]
Use Fig. 7.1 to determine the focal length of the converging lens.
(a(ii))[3]
Using Fig. 7.1, find the position of the image formed by the lens by extending each ray beyond the lens. Mark the image position with an arrow.
(b(i))[1]
Within Fig. 7.2, one region has no label. State the name of that region.
(b(ii))[1]
Describe one application of ultraviolet light.
(b(iii))[1]
Describe one harmful effect on people caused by excessive exposure to ultraviolet light.