A convex lens of focal length 5cm is used as a magnifier.
(i) Calculate its angular magnification when the final image is at infinity.
(ii) Calculate its angular magnification when the final image is formed at the least distance of distinct vision D=25cm.
(iii) Which mode in parts (i) or (ii) is more comfortable for prolonged viewing? State the reason in one line.
a. (i)
b. (ii)
c. (iii)