Show that radiation at a distribution of temperatures decreases the estimate (34.34) of the uniform temperature radiative

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Show that radiation at a distribution of temperatures decreases the estimate (34.34) of the uniform temperature radiative response λ0 by proving the result in the case where the radiation comes from two different temperatures. Assume I = aσ (T − y)4 + bσ (T + y)4 =240 W/m2, for fixed values of a + b = 1 and y, and repeat the computation leading to the estimate (34.34)

- Fo approx = A(o T*) = 40 T³AT 3.76 AT W/m? K-!


a) Show that the distributed estimate decreases for the specific values (a = b = 1/2, y = 1 K); 

b) Prove analytically that the distributed estimate decreases for any values of a, b, y and start with a = b = 1/2; 

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The Physics of Energy

ISBN: 978-1107016651

1st edition

Authors: Robert L. Jaffe, Washington Taylor

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