Focal length from distances measured from the focus (Newton's formula)
This type of question, asked 2 times: 28 Jul 2022, 30 Jan 2024. All 2 questions below, oldest first.
Try each one first, then open its answer.
Question 1
28 Jul 2022
119In an experiment with a convex lens. The plot of the image distance (v') against the object distance measured from the focus gives a curve . If all the distances are measured in . The magnitude of the focal length of the lens is .Question 2
30 Jan 2024
114In an experiment to measure the focal length (f) of a convex lens, the magnitude of object distance ( ) and the image distance (y) are measured with reference to the focal point of the lens. The plot is shown in figure. The focal length of the lens is ____ cm.