Q 1220734611.     The radiancy of a black body is `M_e = 3.0 W//cm^2` . Find the wavelength corresponding to the maximum emissive capacity of the body.
`b = 2.9 xx 10^(-3) m.K; sigma= 5.67 xx 10^(-2) K^(-4).`


A

`4 xx 10^(-6) m`

B

`3 xx 10^(-6) m`

C

`3.4 xx 10^(-6) m`

D

`3.9 xx 10^(-6) m`

HINT

`M_e = sigmaT^4`
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