A student obtains a straight-line graph of emissive power versus for a blackened filament

PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter

Problem

A student obtains a straight-line graph of emissive power EE versus T4T^{4} for a blackened filament. The slope of the best-fit line is 5.60×10−8 W m−2 K−45.60\times10^{-8}\,\text{W m}^{-2}\,\text{K}^{-4}. What value of the Stefan–Boltzmann constant should the student report? (a) 1.40×10−8 W m−2 K−41.40\times10^{-8}\,\text{W m}^{-2}\,\text{K}^{-4} (b) 5.60×10−7 W m−2 K−45.60\times10^{-7}\,\text{W m}^{-2}\,\text{K}^{-4} (c) 5.60×10−8 W m−2 K−45.60\times10^{-8}\,\text{W m}^{-2}\,\text{K}^{-4} (d) 1.78×10−8 W m−2 K−41.78\times10^{-8}\,\text{W m}^{-2}\,\text{K}^{-4}

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