In class, we learned that â€most†of the sun’s radiation happensin the band 0.2 ? ? ? 3µm, and Stephen asked what â€most†means.What proportion of solar radiation (for a black body sun) falls inthe above wavelength range. Similarly, what proportion of theEarth’s radiation (black body Earth at 290K) occurs in thewavelength band 4 ? ? ? 40µm? What wavelength range contains themiddle 95% of the sun’s radiation?
