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B. M. Birla Planetarium is a large planetarium in Chennai, India.The fifth B. M. Birla planetarium in the country, it is located at Kotturpuram in the Periyar Science and Technology Centre campus which houses eight galleries, namely, Physical Science, Electronics and Communication, Energy, Life Science, Innovation, Transport, International Dolls and Children and Materials Science, with over ...
The lamp itself was an updated design by Philips, strengthened to withstand the forces on the white-hot filament caused by high-speed movement of the head. The VL5 was the first moving light to use "cold mirror" technology to provide a cool, high-intensity light beam, which could be placed close to objects and people, without burning them.
The Sussmann lamp [58] was introduced into Britain in 1893 and following trials at Murton Colliery in Durham it became a widely used electric lamp with 3000 or so reported by the company in use in 1900 [59] However, by 1910 there were only 2055 electric lamps of all types in use – about 0.25% of all safety lamps. [60]
Researchers use daylight as the benchmark to which to compare color rendering of electric lights. In 1948, daylight was described as the ideal source of illumination for good color rendering because "it (daylight) displays (1) a great variety of colors, (2) makes it easy to distinguish slight shades of color, and (3) the colors of objects around us obviously look natural".
[288] [289] The pavilions were mostly illuminated by artificial light fixtures, [287] [290] including fluorescent lighting tubes, mercury lamps, and fluorescent pylons. [291] The fairground also had a marina, as well as hundreds of fountains, toilets, and benches.
B. M. Birla Science Museum is an Indian science museum located in Hyderabad, India. Constructed by civil engineer P. A. Singaravelu, it comprises a planetarium, museum, science centre, art gallery as well as a dinosaurium. [1] The museum itself was the second phase of the science centre when it opened in 1990. [2]
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