lens equation
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Lens (optics) — For other uses, see Lens. A lens. Lenses can be used to focus light. A lens is an optical device with perfect or approximate axial symmetry which tra … Wikipedia
Lens clock — A lens clock is a mechanical dial caliper that is used to measure dioptric power of a lens. It is a specialized version of a spherometer. A lens clock measures the curvature of a surface, but gives the result in diopters, assuming the lens is… … Wikipedia
Thin lens — In optics, a thin lens is a lens with a thickness (distance along the optical axis between the two surfaces of the lens) that is negligible compared to the focal length of the lens. Lenses whose thickness is not negligible are sometimes called… … Wikipedia
Corrective lens — A bifocal corrective eyeglass lens A pair of contact le … Wikipedia
Lenticular lens — A series of cylindrical lenses molded in a plastic substrate A lenticular lens is an array of magnifying lenses, designed so that when viewed from slightly different angles, different images are magnified.[1] The most common example is the lenses … Wikipedia
Defining equation (physics) — For common nomenclature of base quantities used in this article, see Physical quantity. For 4 vector modifications used in relativity, see Four vector. Very often defining equations are in the form of a constitutive equation, since parameters of… … Wikipedia
Gravitational lens — Gravitational Lensing Formalism Strong lensing … Wikipedia
Electromagnetic wave equation — The electromagnetic wave equation is a second order partial differential equation that describes the propagation of electromagnetic waves through a medium or in a vacuum. The homogeneous form of the equation, written in terms of either the… … Wikipedia
Simple equation — Simple Sim ple, a. [Compar. {Simpler}; superl. {Simplest}.] [F., fr. L. simplus, or simplex, gen. simplicis. The first part of the Latin words is probably akin to E. same, and the sense, one, one and the same; cf. L. semel once, singuli one to… … The Collaborative International Dictionary of English
Depth of field — The area within the depth of field appears sharp, while the areas in front of and beyond the depth of field appear blurry … Wikipedia
Gravitational lensing formalism — In general relativity, a point mass deflects a light ray with impact parameter b by an angle hat{alpha} = frac{4GM}{c^2b}. A naïve application of Newtonian gravity can yield exactly half this value, where the light ray is assumed as a massed… … Wikipedia
