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3. On the Mechanical Value of a Cubic Mile of Sunlight, and on the possible density of the Luminiferous Medium
Published online by Cambridge University Press: 16 March 2015
Extract
The velocity of light being 192,000 miles per second, and the mechanical value of sunlight incident perpendicularly on a square mile at the earth's distance being 83 × 5280 × 5280 foot pounds; the mechanical value of all the energy potential and actual, kept up in the space of a cubic mile by sunlight crossing it, is = 1200 ft. lbs. at the earth's distance. Similarly the mechanical value of a cubic mile of sunlight near the sun is found to be 1200 × 46,000=55,000,000 foot pounds.
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- Proceedings 1853-54
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- Copyright © Royal Society of Edinburgh 1857