In physics laboratory a student is trying to calculate the

Last updated: 6/5/2023

In physics laboratory a student is trying to calculate the focal length of a convex lens He measures the distance between screen and a light source lined up on the optical bench to be 120 cm When he shifts the lens along the axis of optical bench sharp image of source is obtained at two lens positions He also measures the ratio of these two magnifications to be 1 9 Which image as seen by student is brighter smaller O bigger both are equally bright can not be judged