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

Answer:

(a) convex lens and a screen

Answer 2

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

(A) a convex lens and a screen

Explanation:

The focal length of convex lens is determined using the convex lens, a screen and a scale to measure focal length.

Convex lens is also known as converging lens where in the lens in the middle is thick and thin at the edges.

The images obtained are real, very small and inverted.

Focal length f is the distance between the optical centre and the principal focus.