Dipleidoscope

A dipleidoscope is an instrument used to determine true noon, its name comes from the Greek for double image viewer. It consists of a small telescope and a prism that creates a double image of the sun. When the two images overlap, it is local true noon. The instrument is capable of determining true noon to within ten seconds.

单词	Dipleidoscope
释义	Dipleidoscope 英语百科 Dipleidoscope A dipleidoscope is an instrument used to determine true noon, its name comes from the Greek for double image viewer. It consists of a small telescope and a prism that creates a double image of the sun. When the two images overlap, it is local true noon. The instrument is capable of determining true noon to within ten seconds.
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