Question

An object 2 cm high placed at a distance of 16 cm from a concave mirror which produced a real image 3cm high the position of the image is 24cm find the of focal length

Answer 1

We use the mirror formula as follows :

1/u + 1/v = 1/f

1/16 + 1/24 = 5/48

1/f = 5/48

f = 48/5 = 9.6cm