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Fresnel lenses of different focal lengths (one collimator, and one collector) are used in commercial and DIY projection. The collimator lens has the lower focal length and is placed closer to the light source, and the collector lens, which focuses the light into the triplet lens, is placed after the projection image (an active matrix LCD panel ...
An iMacquarium A Macquarium made from a Macintosh Classic II. A Macquarium is an aquarium made from, or made to sit within, the shell of an Apple Macintosh computer. The term was coined by computer writer Andy Ihnatko as a joke at the outdated Macintosh 512K; [1] Macquariums have since been built both by Ihnatko himself and by others.
Following Apple's lead, other computer makers focused on "legacy-free" personal computers. [89] [90] The iMac's sales helped buoy Apple while it released a modern operating system and refreshed the rest of the Mac lineup. The computer's success positioned the company to focus on emerging digital media trends. [5]
As with objective lenses, a condenser lens with a maximum numerical aperture of greater than 0.95 is designed to be used under oil immersion (or, more rarely, under water immersion), with a layer of immersion oil placed in contact with both the slide/coverslip and the lens of the condenser. An oil immersion condenser may typically have NA of up ...
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Computer monitors are generally placed directly in front of users and can lead to muscle fatigue due to the unusual straight and constant movement of the head. [16] This trouble is mitigated by the use of monofocal lenses for computer use.
“We’re now seeing older individuals getting radicalized,” Smith said. “ISIS is using the same methods they always have of projecting great strength and trying to excite those excited by ...
A scary, sobering look at fatal domestic violence in the United States
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