20 Physics -- Lenses

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More notes on Lenses

Lens Formula For Convex Lens (Real and Virtual)

Lens FormulaIt is a relationship between the focal length of a lens and distances of object and image from the optical center of the lens. To derive this formula we use the following sign conventio...

Lens in surrounding of different refractive index

LENS IN SURROUNDING OF DIFFERENT REFRACTIVE INDEXESLens is generally used either to converge or to diverge the rays of light. Generally lenses are made from materials having refractive indices grea...

Combination of lens

COMBINATION OF LENSES(i) For a system of n-lenses in combination, the net focal length (f), net power (P) and magnification (m) are given as follows: (ii) In case when two thin lens are in contact...

Lens Maker Formula

Lens maker formula is an expression that shows relation between the refractive index, the focal length and the radii of curvatures of the lens.1f = (n−1)(1R1 + 1R2)where, f = focal length of the le...