Question

The focal length of a convex lens is always negative.(State whether the statement is true or false)


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Answer 1

Answer:

False

Explanation:

For converging lenses (convex lenses), the focal length is always positive, while diverging lenses (concave lenses) always have negative focal lengths.

Answer 2

Answer:

The given statement is true. Focal length is always negative for cancave lens. Focal length is always positive for convex lens