Question

an object is placed at a distance of 30 cm from a convex mirror,the magnification produced is 1/2 where should the object be placed to get the magnification of 1/3

Answer 1

Answer:

7.5 cm.

Explanation:

y/x = 1/2 , y = x/2

1/f = 1/15 -2/15= - 1lx , f = -15

y/x = 1/3

1/f = 1/x -3/x , -1/15 = -2/x , x = 15/2

distance = 7.5 cm.