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The spectral emissive power E ? for a body at temperature T 1 is plotted against the wavelength and area under the curve is found to be A. At a different temperature T 2 , the area is found to be 9A. Then ? 1 /? 2

The spectral emissive power E? for a body at temperature T1 is plotted against the wavelength and area under the curve is found to be A. At a different temperature T2, the area is found to be 9A. Then ?1/?2

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Grade:12

1 Answers

Arun
25763 Points
3 years ago
Dear Arpit
E1 / E2 = 1/ 9 = (T1/ T2)4
hence
T1/ T2 = 1 / \small \sqrt3
Now
As we know, from wein’s formula – 
\small \lambda T = constant
Hence
\small \lambda1 / \small \lambda2 = T2 / T1
\small \lambda1 / \small \lambda2 = \small \sqrt3
Regards
Arun (askIITians forum expert)

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