Tag: The intensity of electromagnetic waves from the sun is 1.4 KW/m2 just above the earth’s atmosphere. Eighty percent of this reaches the surface at noon on a clear summer day. Suppose you model your bac
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How Many Joules of Solar Energy?
The intensity of electromagnetic waves from the sun is 1.4 KW/m2 just above the earth’s atmosphere. Eighty percent of this reaches the surface at noon on a clear summer day. Suppose you model your back as a 33 cm x 53 cm rectangle. How many joules of solar energy fall on your back as you work on your tan for 1.4 h?…