Question

10. Explain the experiment to find out the focal length of a convex lens.​

Answer 1

Answer:

To find the focal length of a convex lens by plotting graphs between u and v or between 1/u and 1/v. An optical bench, two sharp-edged needle (pins), convex lens of less than 20 cm focal length, three uprights (with clamps), index needle (may be a knitting needle), metre scale and spirit level. 1.

Answer 2

Answer:

To find the focal length of a convex lens by plotting graphs between u and v or between 1/u and 1/v. An optical bench, two sharp-edged needle (pins), convex lens of less than 20 cm focal length, three uprights (with clamps), index needle (may be a knitting needle), metre scale and spirit level. 1.