(a) Define the following terms as applied to a convex mirror:

(i) principal focus; (ii) pole (iii) radius of curvature.

(b) State one advantage and one disadvantage of using a convex mirror as a driving mirror.

(c) Draw a clearly labelled diagram to illustrate how two converging lenses may be arranged to form a compound microscope.

(d) An object 2.5 mm long is viewed through a converging lens of focal length 10.0 cm held close to the eye. A magnified image of the object is formed 30.0 cm from the lens. Calculate the:

(i) distance of the object from the lens; (ii) size of the image; (iii) power of the lens.