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http://www.astrosociety.org/edu/publications/tnl/41/shadow.html.
http://www.astrosociety.org/edu/publications/tnl/41/shadow.html.
1. ASP: Eclipse Watching: Making a Solar Filter
adapted from Observe: Eclipses, published in 1979 by the Astronomical League and "Safe Solar Filters," by B. Ralph Chou, Sky and Telescope, August 1981) . ... Tape TWO pieces of film together into a sandwich, and tape this over the opening in the cardboard. ... The cardboard frame will act as a shade from the bright Sun, while you safely observe through the film sandwich. ... Undeveloped film is not safe. ... tape . ... At the end of one of the tubes, tape the aluminum foil, and make a tiny pinhole. ...
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Ссылки http://www.astrosociety.org/edu/publications/tnl/41/filter.html -- 10.0 Кб -- 02.10.2012
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