A Study of Direct and Indirect Illumination (Classic Reprint) - Rilegato

Simons, Alexander McDougall

Rilegato

ISBN 10: 0265869587 ISBN 13: 9780265869581

Casa editrice: Forgotten Books, 2019

Riassunto

Excerpt from A Study of Direct and Indirect Illumination

In order to compare different systems of illumination there must be some means of comparison. Consequently we have the candle power, foot candle, mean spherical candle and etc. The candle power is the unit by which the intensity of a source is measured. Thus a light is said to have an intensity of one candle power when it has the same intensity as a sperm candle which burns 20 grams of sperm in 10 minutes. This is the English unit of intensity. The German unit is 9 of the English.

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Dettagli dell'edizione

• Editore: Forgotten Books
• Data di pubblicazione: 2019
• Lingua: Inglese
• ISBN 10: 0265869587
• ISBN 13: 9780265869581
• Rilegatura: Copertina rigida
• Numero di pagine: 126
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