Question

The focal length of converging lens is _____.​

Answer 1

Answer:

The focal length of a lens depends on the curvature of each surface. The more highly curved the surfaces, the shorter the focal length.

Therefore, a thick lens has shorter focal length than a thin lens.

Hence, The focal length of a thin convex lens is more than that of a thick convex lens.

Answer 2

Answer:

The distance from the lens to the focal point is called the focal length. For converging lenses, the focal length is always positive, while diverging lenses always have negative focal lengths.

Explanation:

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