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Camera lucida in use. A camera lucida is an optical device used as a drawing aid by artists and microscopists.. The camera lucida projects an optical superimposition of the subject being viewed, onto the surface upon which the artist is drawing.
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Reprocessed Mariner 10 data was used to produce this image of Mercury. The smooth band is an area of which no images were taken. Mariner 10 was an American robotic space probe launched by NASA on 3 November 1973, to fly by the planets Mercury and Venus.
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Gmail is the email service provided by Google.As of 2019, it had 1.5 billion active users worldwide, making it the largest email service in the world. [1] It also provides a webmail interface, accessible through a web browser, and is also accessible through the official mobile application.
The Prentice position. The Prentice position is an orientation of a prism, used in optics, optometry and ophthalmology. [1] In this position, named after the optician Charles F. Prentice, the prism is oriented such that light enters it at an angle of 90° to the first surface, so that the beam does not refract at that surface.
For scams conducted via written communication, baiters may answer scam emails using throwaway email accounts, pretending to be receptive to scammers' offers. [4]Popular methods of accomplishing the first objective are to ask scammers to fill out lengthy questionnaires; [5] to bait scammers into taking long trips; to encourage the use of poorly made props or inappropriate English-language ...
Digital Light Processing (DLP) projector: A DLP projector creates an image using a digital micromirror device (DMD chip), which on its surface contains a large matrix of microscopic mirrors, each corresponding to one pixel in an image. Each mirror can be rotated to reflect light such that the pixel appears bright, or the mirror can be rotated ...