1.

Determine the spectral existence of a body by using plank s law, if the wave length is given as 456m and the absolute temperature is 765K.

A. 3.6*10<sup>30</sup> W / sq. m
B. 4.6*10<sup>30</sup> W / sq. m
C. 6.6*10<sup>30</sup> W / sq. m
D. 3.6*10<sup>30</sup> W / sq. m
Answer» B. 4.6*10<sup>30</sup> W / sq. m


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