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what is focal point of a lens

Posted by Shubham Mamgain 5 years ago

CBSE > Class 12 > Physics

2 answers

Tanisha Yadav 5 years ago

The focal length ( f ) is the distance from a lens or mirror to the focal point ( F ). (right) a concave mirror. ... Note that a lens has a focal point on both sides of the lens axis. Light rays that are parallel to each other, but not to the optical axis, will meet on the focal plane.

Yogita Ingle 5 years ago

A convex lens is a lens with an outward curve. Unlike the concave lens, the thickness at the centre of a convex lens is more than the thickness at the edges of the lens. Convex lenses are converging lenses. They have the ability to converge a parallel beam of light into a point. This point is called the focal point of the convex lens and the distance from the optical centre to the focal point is called the focal length. The focal point is on the opposite side of the lens from which the light rays originate.

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