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re: a firmament greenhouse proposal
6 aug 2004
toby anderson wrote:
>i found a website which had a fresnel 'calculator' program.
it looks like your calcs are overly-complex and wrong, again.
you might try a book, eg example 5.1.1 on page 271 of duffie
and beckman's 1991 solar engineering of thermal processes.
calculate the reflectance of one surface of glass at normal
indicence and at 60 degrees. the average index of refraction
of glass for the solar spectrum is 1.526.
solution: at normal incidence, r(0) = ((n-1)/(n+1))^2 = 0.0434.
please stop spreading your confusion.
nick
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