An object is placed (a) 6cm (b) 20cm from a thin convex lens of focal length 10cm. Determine the nature, position and magnification of the image in each case.

Answer 1

1/p + 1/q = 1/f
1/6 + 1/q = 1/10
M = -q/p
Upright or inverted is by the sign of q, + or -