Question

an object placed at a distance of 20cm from a convex mirror of focal lengths 15 cm find the position and nature of image

Answer 1

object distance ‘u’ is 20 cm and focal length ‘f’ is 25 cm. while substituting these values in the relation 1/u+1/v=1/f1/u+1/v=1/fwe will get the image distance ‘v’ as -100 cm which means that the image is 100 cm away from the vertex ‘V’ and the nature of the image is Virtual.