3 At what distance from a convex mirror of focal length 2 5

Last updated: 6/9/2023

3 At what distance from a convex mirror of focal length 2 5 m should a boy stand so that his image has a height equal to half the original height The principal axis is perpendicular to the height Solution We have or Also or or m V HBHB 1 1 1 u 1 u U U u u 2 u f 1 u 2 1 2 5 m 1 2 5 m 2 5 m or Thus he should stand at a distance of 2 5 m from the mirror