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From Kirchoff's law the ratio of emissiv...

From Kirchoff's law the ratio of emissive power and absorption power of all bodies-

A

are different

B

is equal to emissive power of black body at same temperature

C

is equal to emissive power of white body

D

is equal to emissive power of black body at any temperature

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The correct Answer is:
To solve the question regarding the ratio of emissive power and absorption power of all bodies according to Kirchhoff's law, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding Kirchhoff's Law**: Kirchhoff's law states that for a body in thermal equilibrium, the ratio of its emissive power (E) to its absorptive power (A) is constant and is equal to the emissive power of a black body (E_b) at the same temperature. 2. **Mathematical Representation**: This can be mathematically expressed as: \[ \frac{E}{A} = E_b \] where: - \( E \) = Emissive power of the body - \( A \) = Absorptive power of the body - \( E_b \) = Emissive power of a black body at the same temperature 3. **Conclusion**: Therefore, the ratio of the emissive power to the absorptive power of all bodies is equal to the emissive power of a black body at the same temperature. 4. **Final Answer**: The correct answer to the question is that the ratio of emissive power and absorption power of all bodies is equal to the emissive power of a black body at the same temperature.
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