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Use the formula lambdamT=0.29cmK to obta...

Use the formula `lambda_mT=0.29cmK` to obtain the characteristic temperature ranges for different parts of the e.m. spectrum. What do the number that you obtain tell you?

Text Solution

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We know, every body atr a give temperature T, emits radiations of all wavelength in certain range. For a
black body, the wavelength corresponding to maximum intensity of radiation at a given temperature T is
given, according to Wein's law, by the relation: `lambda_mT=0.29cm K or T=0.29/(5xx10^-5)~=6000K`
It is to be noted that, a body at lower temperature will also produce this wavelength but not with maximum
intensity.
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