(a(i))[1]
Determine the distance of the image from the centre of the lens. Use the information shown in Fig. 8.1.
(a(ii))[1]
Determine the focal length of the lens. Use the information shown in Fig. 8.1.
(a(iii))[2]
State two characteristics of the image formed by the lens in Fig. 8.1.
(b(i))[2]
Complete Fig. 8.2 by writing the name of one type of radiation in each box.
(b(ii))[1]
State one use of ultraviolet radiation.
(b(iii))[1]
State one danger to people from too much exposure to ultraviolet radiation.