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triac
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Homework Statement
Hi! I'm trying to calculate the energy ratio of EM-radiation in the visible spectrum and EM-radiation in the entire spectrum, of a body with known temperature.
Homework Equations
Planck's law: http://feps.as.arizona.edu/outreach/images/Blackbody_gr_3.gif.[/URL]
However, I have a constant temperature and a variable wavelength, so I will let B(T) be I([tex]\lambda[/tex])
The Attempt at a Solution
I believe i can calculate the ratio (r) as: r=[tex](\int_a^b\ I'(\lambda,T)d\lambda)/(\int_c^d\ I'(\lambda,T)d\lambda)[/tex] , where a and b mark the limits of the visible spectrum and c and d marks the limits of the entire spectrum. As I am unable to solve this algebraicly, I entered Planck's law on my calculator. However, the curve I go was completely wrong. Do you have any idea of what's wrong?
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