The radiant energy reaching the earth from the sun is about 1400 W/m 2 . If this

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The radiant energy reaching the earth from the sun is about 1400 W/m2. If this energy is all green light of wavelength 5.5 × 10-7 m, how many photons strike each square meter per second?

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The Physical Universe

ISBN: 978-0077862619

16th edition

Authors: Konrad B Krauskopf, Arthur Beiser

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