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April Wilkerson. Born. 1987 (age 36–37) Corpus Christi, Texas, U.S. Nationality. American. Known for. DIY construction videos. April Wilkerson (born 1987) is an American YouTuber who specializes in do-it-yourself woodworking and metalworking projects around the home. [1][2][3][4][5]
A bicycle reflector appears brighter to the passenger car driver than to the truck driver at the same distance from the vehicle to the reflector. [1] The light beam and the normal axis of the reflector as shown in Figure 2 form the entrance angle. The entrance angle is a function of the orientation of the reflector to the light source.
A freshwater aquarium with plants and various tropical fish. An aquarium (pl.: aquariums or aquaria) is a vivarium of any size having at least one transparent side in which aquatic plants or animals are kept and displayed. Fishkeepers use aquaria to keep fish, invertebrates, amphibians, aquatic reptiles, such as turtles, and aquatic plants.
Retroreflectors are devices which reflect light back to its source. Six were left at six sites on the Moon by three crews of the Apollo program, two by remote landers of the Lunokhod program, and one by the Chandrayaan program. [1] Lunar reflectors have enabled precise measurement of the Earth–Moon distance since 1969 using lunar laser ranging.
A parabolic (or paraboloid or paraboloidal) reflector (or dish or mirror) is a reflective surface used to collect or project energy such as light, sound, or radio waves. Its shape is part of a circular paraboloid, that is, the surface generated by a parabola revolving around its axis. The parabolic reflector transforms an incoming plane wave ...
Lunar Laser Ranging experiments. Lunar Laser Ranging (LLR) is the practice of measuring the distance between the surfaces of the Earth and the Moon using laser ranging. The distance can be calculated from the round-trip time of laser light pulses travelling at the speed of light, which are reflected back to Earth by the Moon's surface or by one ...
The two senior cats recently came to the rescue and were having a hard time adjusting to their new life. These cats might be seniors, but they still have so much love to give. In a video the ...
PBS. Release. January 7, 1989. (1989-01-07) –. October 16, 2009. (2009-10-16) The New Yankee Workshop is an American half-hour woodworking television series produced by WGBH Boston, which aired on PBS. Created in 1989 by Russell Morash, the program was hosted by Norm Abram, a regular fixture on Morash's television series This Old House.
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