1.

The maximum energy in thermal radiation from a source occurs at the wavelength 4000Å. The effective temperature of the source is                                                    [AMU (Engg.) 1999]

A.            \[7325\,K\]                           
B.            \[80000K\]
C.            \[{{10}^{4}}\,K\]                 
D.            \[{{10}^{6}}\,K\]
Answer» B.            \[80000K\]


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