Fabulous Equation Of Power Of Lens
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In fact the power of a lens is by definition the reciprocal of the focal length of the lens.
Equation of power of lens. Simply put the power of a lens in Ray Optics is its ability to bend light. Power is the ability to bend light and it is equal to the reciprocal of the focal length of the lensmirror in meters. After that five sums related to the power of lens have been explained.
The Lens Equation An image formed by a convex lens is described by the lens equation 1 u 1 v 1 f where uis the distance of the object from the lens. The SI unit of power is Dioptre. The power of a lens is defined as the reciprocal of the focal length.
For the usual situation of a lens in air we can put n 1 which leaves you with an even simpler expression for 1. Simply rearranging the terms dividing by n gives you an expression for 1 f which is known as the power of the lens and is expressed in diopters. The SI unit of the focal length is the meter m.
Formula of power of a lens is. The power for a convex lens is positive and the power for a concave lens is negative. The degree of convergence or divergence depends upon the focal length of the lens.
This is also known as diopter. The correct answer is Dioptre. Power of.
Power P 1f. So the SI unit of power 1SI unit of focal length m-1 Dioptre D. As a result the power of this lens is 667 D.
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