Question

what is focal length........​

Answer 1

❤FOCAL LENGTH :

The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power. A positive focal length indicates that a system converges light, while a negative focal length indicates that the system diverges light

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Answer 2

Answer:

Heyaa♡♡

Here it is -

Focal length is the distance between the center of a convex lens or a concave mirror and the focal point of the lens or mirror — the point where parallel rays of light meet, or converge.

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