1.

The plots of intensity versus wavelength for three black bodies at temperatures T_(1),T_(2) and T_(3) respecttively are shown in fig. Their temperatures are such that :

Answer»

`T_(1)gtT_(2)gtT_(3)`
`T_(2)gtT_(3)gtT_(1)`
`T_(1)gtT_(3)gtT_(2)`
`T_(3)gtT_(2)gtT_(1)`.

Solution :By Wein.s DISPLACEMENT law
`lamda_(m)PROP(1)/(T)`.
Since `lamda_(m_(1))ltlamda_(m_(3))ltlamda_(m_(2))."":.T_(1)gtT_(3)gtT_(2)`.
correct choice is (c ).


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