Physics, asked by deepak9140, 1 day ago

What is Focal Length?
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Answered by kavitha1221980
3

Answer:

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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Answered by santa19
1

Answer:

The focal length ( f ) is the distance from a lens or mirror to the focal point ( F ). This is the distance from a lens or mirror at which parallel light rays will meet. ... Note that a lens has a focal point on both sides of the lens axis.

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