Question

a 1cm high object is placed at a distance of 2 focus from a concex lens, what is the height of the image formed .

Answer 1

using (1/ v) - (1/ u) = (1 / f)

(1/ v) - (1/ - 2f) = (1 / f)

(1/ v) = (1 / 2f)

v = 2 f

m = v / u = 1

h' / h = 1

h' = h = 1 cm