Question

Unit of Stefan's constant is

• A. Watt-m2-K
• B. Watt-m2/K4
• C. Watt/m2–K
• D. Watt/m2K4

Answer 1

Answer: (D)

Watt/m2K4

Answer 2

The correct option is (D) : Watt/m2K4

Stefan's law is E=σ(T4 )

$\Rightarrow$ σ= $\frac{E}{T^4}$

where, E=$\frac{Energy}{Area\times Time}$ =Watt/ m2 σ= Watt/m2k4