Question

A real image formed by a concave mirror is magnified three times and is formed at a distance of 16 cm
from the object. Find the distance of the object from the mirror:
1)8 cm
2) 16 cm
3) 4 cm
4) 32 cm​

Answer 1

Answer:

Given

Concave mirror

m=-3 cm

v=-16 cm

Using Mirror formula

$\frac{1}{f} = \frac{1}{u} + \frac{1}{v}$

And using Magnification formula

$\frac{ - v}{u} = m$

$u \: = \frac{ - 16}{3}$

So I get this