Question

on an optical bench the Convex lens is placed at the point 30cm and the screen is at the point 48cm so that a sharp image of a distant tree is made on the screen. what will be the focal length of the lens? Also write the nature of the image obtained on the screen​

Answer 1

Answer:

The focal length will be 18cm

Explanation:

Because we should take the distant tree as light rays coming from infinite. Which we get image at focal length. It will be 48-30=18cm

Nature of the image is real and inverted.

Size is diminished