"A lens is a piece of a refracting medium bound by two surfaces at least one of which is curved.
A convex lens is thicker in the middle than at the edges.
A lens may be thought of as an arrangement of a set of tiny prisms with a very small glass slab at the centre.
The focal point of a convex lens is the point on its principal axis where the light rays incident parallel to the axis converge after refraction through the lens.
The distance from the optical centre to the focal point is called the focal length, f, of the lens and is positive for a convex lens.
A convex lens is a converging lens and has two real foci." - Designmate
Converging Lenses - E Portuguese - Designmate icsec | |
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| Education | Upload TimePublished on 24 Jul 2012 |
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