Where Mp is Magnifying power, LDDV is the least distance of distinct vision you found in step 7, and Lf is the focal length of the lens.

What isfocal lengthof lens

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Focal length and magnificationphysics

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Magnifying power is how much larger a given lens can make an image appear. This is a direct relationship between the focal length of the lens and the least distance of distinct vision, or LDDV. The LDDV is the closest your eyes can comfortably look at an object.

Difference betweenfocal length and magnification

Focal length and magnificationformula

The distance of distinct vision is usually somewhere around 10 cm for a person with perfect vision. Magnifying lenses with shorter focal lengths will have greater magnifying power.

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A lens is a clear object, usually made of glass or plastic, which is used to refract, or bend light. Lenses can concentrate light rays (bring them together) or spread them out. Common examples of lenses include camera lenses, telescope lenses, eyeglasses, and magnifying glasses. Lenses are often double lenses, meaning they have two curved sides. A convex lens is rounded outward, while a concave lens curves inward. (A great way to remember this is that a concave lens creates an indent like a cave!)

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Focal length and magnificationcalculator

Another feature of lenses is called lens power, very similar to magnifying power, and is expressed in the following relationship:

Etymology. edit. By analogy with binocular; see tri-. Adjective. edit.

Focal lengthof lens formula

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The center axis through a lens is called the principal axis. On lenses that concentrate light rays, the point at which the rays meet, the focal point, is located on the principal axis. The distance the focal point is from the surface of a lens is called the focal length of a lens, and is important when determining the magnifying power of devices like magnifying glasses.

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Magnifying power is inversely related to the focal length of a lens: the bigger the focal length, the lower the magnifying power. The LDDV is a constant number, as it usually tends to be the same for people with good vision. Focal length and LDDV have to be measured in the same units for the calculations to work out—they’re usually measured in meters (or centimeters).

The process of transforming unpolarized light into polarized light is known as polarization. There are a variety of methods of polarizing light. The four ...

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