Question

The reflection of a 10.0 cm object appears to be 18 cm tall and 9 cm behind the mirror.

What distance is the object from the mirror?

cm

Answer 1

5 cm

Step-by-step explanation:

correct on edge 2020/2021

Answer 2

Answer: 5cm

Step-by-step explanation:

Given the following :

Image height = 18cm

Object height = 10cm

u = object distance

v = image distance = 9 cm

Using the relation:

image height/object height= v/u

18/10 = 9/u

Cross multiply

18 × u = 10 × 9

18u = 90

u = 90/18

u = 5cm

Therefore,

Object distance from mirror = 5cm