Question

The focal length of a convergimg lens is ?​

Answer 1

Hey mate ,

The focal length is the distance from the center of the lens to the principal foci (or focal points) of the lens.

The focal length is positive, and is the distance at which a beam of collimated light will be focused to a single spot.

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Answer 2

converging lens the focal length is positive and is the distance at which of beam of collimated

light will be focused to a single spot..