Revolving Light
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“In order to produce, on the catoptric system, a fixed light showing all round the circle, a number of reflectors are fixed round the outside of a stationary chandelier n. As the ordinary paraboloid has about 14 degrees of divergence, twenty-five reflectors were needed to light up continuously (though not equally) the whole horizon.” —The Encyclopedia Britannica, 1910
Keywords
lighthouse, mirror, light, reflection, Reflector, Parabolic, Hutchinson, Paraboloid, CatoptricSource
The Encyclopedia Britannica, New Warner Edition (New York, NY: The Werner Company, 1893)
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