Question

Converging mirror forms a real image of height 4 cm of an object of height 1cm placed 20 cm away from the mirror calculate the image distance. What is the focal length of the mirror ​

Answer 1

Answer:hi=4cm,ho=1cm

u=-20cm

Magnification m=hi/ho=4/1=4cm

m=-v/u

v=80cm

Now mirror equation,

1/f=1/u+1/v

Solve it to get focal length

Explanation:

Hope it helps....