Question

If you are to determine to focal length of a convex lens, you should have

(A) a convex lens and a screen

(B) a convex lens and a lens holder

(C) a lens holder, a screen holder and a scale

(D) a convex lens, a screen, holder for them and a scale

Answer 1

A convex lens, a screen, holders for them and a scale are required in order to determine the focal length of a convex lens.

The Correct Answer is D