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This clever projector has over 10,000 five-star reviews on Amazon, like one that called it "perfect for bedroom, media room, or home theater."One shopper, who purchased it as a gift for his nieces ...
A projection clock usually needs a backlight like an incandescent bulb or LED.. There are low-brightness and high-brightness clocks. While the projection created by low-brightness clocks can be viewed only in a darkened room, high-brightness ones can also be viewed in bright light or daylight.
A projector or image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent lens , but some newer types of projectors can project the image directly, by using lasers .
A planetarium projector, also known as a star projector, is a device used to project images of celestial objects onto the dome in a planetarium. Modern planetarium projectors were first designed and built by the Carl Zeiss Jena company in Germany between 1923 and 1925, and have since grown more complex.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Star_projector&oldid=233474926"This page was last edited on 22 August 2008, at 04:39 (UTC) (UTC)
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