Question

For a convex mirror the image distance (v) = 5 cm, focal length (f) = 10 cm and height of the image (h) = 7.5 cm. The correct representation according to sign conventions is:

a) v = -5 cm, f = - 10 cm and hi = - 7.5 cm

b) v = -5 cm, f = + 10 cm and hi = - 7.5 cm

c) v = +5 cm, f = - 10 cm and hi = + 7.5 cm

d) v = +5 cm, f = + 10 cm and hi = + 7.5 cm

Answer 1

Correct answer is (d) v = +5 cm, f = + 10 cm and hi = + 7.5 cm

For a convex mirror the image distance (v) = 5 cm, focal length (f) = 10 cm and height of the image (h) = 7.5 cm. The correct representation according to sign conventions is v = +5 cm, f = + 10 cm and hi = + 7.5 cm.