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Grade: 12
        
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
one year ago

Answers : (1)

Arun
22780 Points
							
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)
one year ago
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