Ghost Clouds Mesopheric Level clouds

timer Asked: Aug 30th, 2015

Question Description

Mesospheric- level clouds called noctilucent clouds, are sunlit for quite some time after dark due to their altitude. The last light reaching an obser.ver at A on Earth occurs at sunset. The last light reaching the noctilucent clouds at some height H occurs some 38 mins after surface sunset.If Earths diameter is taken to be 1.27 * 10 7 m, at what altitude (H) are the clouds?

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