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The ceiling projector or cloud searchlight is used to measure the height of the base of clouds (called the ceiling) above the ground. It is used in conjunction with an alidade, usually positioned 1000 ft (300 m) away and wherever possible set at the same level. The projector is normally set at 90°, although 71° 31' may be used, in relation to ...
A projection clock (also called ceiling clock) is an analogue or digital clock equipped with a projector that creates an enlarged image of the clock face or display on any surface usable as a projection screen, most often the ceiling. [1] The clock can be placed almost anywhere if only the projected image must be seen.
It consists essentially of a rotating projector, a detector, and a recorder. [6] The projector emits an intense beam of light above into the sky at an angle that varies with the rotation. The detector, which is located at a fixed distance from the projector, uses a photodetector pointing vertically. When it detects the projected light return ...
The mother placed a projector aimed at the ceiling on the counter . Her daughter was totally mesmerized by the cartoon and too distracted to make a fuss. "Genius, I have two girls who detest wash ...
Buy Now: amazon.com #7 Bring The Magic Of The Night Sky Into Your Home With The Star Projector .This Enchanting Device Projects A Stunning Array Of Stars And Constellations Onto Your Ceiling ...
If you’re projector-shopping, be prepared to go down a deep rabbit hole indeed. Our cursory search on Amazon showed over 2,000 results. … These Bestselling Projectors Are Up to $250 Off for ...