miroir | francusko - engleski prevod

miroir

muški rod

1. Glace.
2. Reflet.

1. mirror

imenica

ETYM Old Eng. mirour, French miroir, Old Fren. also mireor, from (assumed) Late Lat. miratorium, from mirare to look at, Latin mirari to wonder. Related to Marvel, Miracle, Mirador.
1. A faithful depiction or reflection.
2. A polished surface that forms images by reflecting light.
Any polished surface that reflects light; often made from “silvered” glass (in practice, a mercury-alloy coating of glass). A plane (flat) mirror produces a same-size, erect “virtual” image located behind the mirror at the same distance from it as the object is in front of it. A spherical concave mirror produces a reduced, inverted real image in front or an enlarged, erect virtual image behind it (as in a shaving mirror), depending on how close the object is to the mirror. A spherical convex mirror produces a reduced, erect virtual image behind it (as in a car’s rear-view mirror).
In a plane mirror the light rays appear to come from behind the mirror but do not actually do so. The inverted real image from a spherical concave mirror is an image in which the rays of light pass through it. The focal length f of a spherical mirror is half the radius of curvature; it is related to the image distance v and object distance u by the equation 1/v + 1/u = 1/f.
Liquid mirrors using, for example mercury, are formed by rotating the liquid so that gravity and centrifugal forces shape it into a perfect parabola. They have a number of advantages over solid mirrors: they do not sag and so can theoretically be made much larger; they are cheaper, and need no polishing. In 1994 a small number of liquid-mirror telescopes had been built for research purposes.

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