Question

when an object is placed at a distance of 50 cm from the concave spherical mirror the magnification produced is minus 1 by 2 where should the object be placed to get a magnification of minus 1 by 5

Answer 1

U=-50
M=-1/2
V=?
M=-v/u
-1/2=-v/-50
50=-2v. ( cross multiply)
50/-2=v
-25 cm= v

Answer 2

Explanation:

when an object is placed at a distance of 50 cm from the concave spherical mirror the magnification produced is minus 1 by 2 where should the object be placed to get a magnification of minus 1 by 5