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A deck prism, or bullseye, is a prism inserted into the deck of a ship to provide light down below. [1] [2] [3] For centuries, sailing ships used deck prisms to provide a safe source of natural sunlight to illuminate areas below decks. Before electricity, light below a vessel's deck was provided by candles, oil and kerosene lamps—all dangerous
A large area of glass can also be added between the sun room and the interior living quarters. Low-cost, high-volume-produced patio door safety glass is an inexpensive way to accomplish this goal. The doors used to enter a room should be opposite the sun room interior glass, so that a user can see outside immediately when entering most rooms.
Prism lighting is the use of prisms to improve the distribution of light in a space. It is usually used to distribute daylight, and is a form of anidolic lighting. Prism lighting was popular from its introduction in the 1890s through to the 1930s, when cheap electric lights became commonplace and prism lighting became unfashionable.
A light tube is not intended for imaging (in contrast to a periscope, for example); thus image distortions pose no problem and are in many ways encouraged due to the reduction of "directional" light. The entrance point usually comprises a dome , which has the function of collecting and reflecting as much sunlight as possible into the tube.
The riddle goes: “There is a green glass door, and some things can go through it and some things cannot.” The person posing the riddle then offers a series of pairs of items, only one item ...
Optical glass refers to a quality of glass suitable for the manufacture of optical systems such as optical lenses, prisms or mirrors.Unlike window glass or crystal, whose formula is adapted to the desired aesthetic effect, optical glass contains additives designed to modify certain optical or mechanical properties of the glass: refractive index, dispersion, transmittance, thermal expansion and ...
Doric and Pansy by Jeannette Ultramarine is a stunning Depression glass pattern with intricate floral details and a striking blue-green hue. Produced from 1937 to 1938, this short-lived pattern ...
The ultimate test was wearing it on an hour-long boat ride to the beach while I stood on the upper deck the entire time, the wind hitting me like a thousand icicles.
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