Question

A simple magnifying lens is used in such a way that an image is formed at 2cm away from the eye.In order to give 10 times maginification,the focal length of the lens should be??

Answer 1

The focal length of the lens is the distance between the lens and the image sensor when the subject is in focus, usually stated in millimeters (e.g., 28 mm, 50 mm, or 100 mm). In the case of zoom lenses, both the minimum and maximum focal lengths are stated