Physics

Problem

Which of the following expressions gives the total emissive power

E

of a blackbody directly in terms of its wavelength of maximum emission

\lambda_{\max}

only (symbols have their usual meanings)? a)

E = 4\sigma b^{4}\,\lambda_{\max}^{-4}

E = \dfrac{\sigma b^{4}}{4}\,\lambda_{\max}^{-4}

E = \sigma b^{4}\,\lambda_{\max}^{-4}

E = \pi\sigma b^{4}\,\lambda_{\max}^{-4}