Question

A 2.5cm candle is placed 12cm away from a convex mirror of focal length 30cm give the location of the image and the magnification

Answer 1

Given that,
u=-12cm , v=?
f=+30 cm we know that
1/f=1/u + 1/v
1/v=1/30 + 1/12
1/v=7/60
v=60/7 cm
Now,
m=-v/u
m=-60/-12×7
m=5/7
Location=60/7cm behind mirror
Magnification=5/7

Answer 2

Explanation:

u=-12cm

v=?

f=30cm

1/f=1/u+1/v

1/v=1/30+1/12

1/v=7/60

magnification formula

m=-v/u

m=-60/12×7

m=5/7