Question

An object 2cm high is placed at a distance of 16cm from a concave mirror which produces a real image of 3cm high.What is the focal length of the mirror and also find the position of the image?

Answer 1

h1=2 cm
u=-16cm
h2=-3cm

m=h2/h1=-v/u

so, v= -24cm

now by mirror formula

1/v+1/u=1/f

we can have 1/f=-5/48

hence , f=-9.6