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  2. A magnifying mirror is a travel must-have for anyone over the ...

    www.aol.com/lifestyle/a-magnifying-mirror-is-a...

    The non-magnified side has eight small LED lights, ideal for doing your makeup or diffusing the light while using the 3x magnification side. To use the LEDs, just flip a switch in the back and you ...

  3. Optical power - Wikipedia

    en.wikipedia.org/wiki/Optical_power

    In optics, optical power (also referred to as dioptric power, refractive power, focusing power, or convergence power) is the degree to which a lens, mirror, or other optical system converges or diverges light. It is equal to the reciprocal of the focal length of the device: P = 1/f. [1] High optical power corresponds to short focal length.

  4. Magnifying glass - Wikipedia

    en.wikipedia.org/wiki/Magnifying_glass

    A pen seen through a magnifying glass Jim Hutton as detective Ellery Queen, posing with a magnifying glass. A magnifying glass is a convex lens that is used to produce a magnified image of an object. The lens is usually mounted in a frame with a handle. Beyond its primary function of magnification, this simple yet ingenious tool serves a ...

  5. 15 best-selling beauty products you probably didn’t know were ...

    www.aol.com/lifestyle/top-rated-beauty-at-costco...

    Simplehuman 8” LED Light Sensor Mirror with 5x and 10x Magnification A good lighted makeup mirror is essential in the mornings, especially in the winter when it's dark and dreary outside.

  6. Binoculars - Wikipedia

    en.wikipedia.org/wiki/Binoculars

    Binoculars concentrate the light gathered by the objective into a beam, of which the diameter, the exit pupil, is the objective diameter divided by the magnifying power. For maximum effective light-gathering and brightest image, and to maximize the sharpness, [27] the exit pupil should at least equal the diameter of the pupil of the human eye ...

  7. Optical telescope - Wikipedia

    en.wikipedia.org/wiki/Optical_telescope

    The Large Binocular Telescope at the Mount Graham International Observatory in Arizona uses two curved mirrors to gather light. An optical telescope gathers and focuses light mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct visual inspection, to make a photograph, or to collect data through electronic image sensors.

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