The Joly Photometer
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
p-441
2025-12-16
10
One of the simplest photometers to make is the Joly, which consists of two square pieces of paraffin with a piece of tin foil between them. If this is used in place of the spot box of the Bunsen photometer, the two sides will be equally lighted and appear equally bright when S: L = d2: d'2 as before.
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