Question

An object is placed at a distance of 45 cm from a concave lens of focal length 15 cm .Find the position of the image

Answer 1

Answer:

For the given concave mirror

f=-15 cm

u=-45 cm

Using mirror formula 1/u+1/v=1/f

u=-27.5 cm

As the object is lying behind 2f so image will be formed in between f and 2f . Image is real .

Magnification m=-v/u=-27.5/45=-0.611

So image height=-10*0.611=-6.11 cm