The value of Stefan's constant is
Correct answer: A. 5.67 x 10^-8 Wm^-2K^-4
- A. 5.67 x 10^-8 Wm^-2K^-4
- B. 5.67 x 10^-6 Wm^-2K^-4
- C. 2.9 x 10^-3 mK
- D. 6.63 x 10^-24 Js
Explanation
Stefan's constant (σ) is a physical constant that relates the total energy radiated per unit surface area of a black body to its temperature raised to the fourth power. Its value is approximately 5.67×10^−8 Wm^−2K^−4.Incorrect Options and Explanations: (b) 5.67 x 10^-6 Wm^-2K^-4 - This is not the correct value for Stefan's constant. (c) 2.9 x 10^-3 mK - This value does not represent Stefan's constant. (d) 6.63 x 10^-24 Js - This value is Planck's constant, not Stefan's constant.
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