As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the_______________?
Correct answer: D. Temperature of the body only
- A. Nature of material of body
- B. Wavelength of monochromatic radiation
- C. Both A. and B.
- D. Temperature of the body only
Explanation
Kirchhoff’s law for total radiation gives E/α = Eᵦ, the emissive power of a blackbody at the same temperature. Therefore, the ratio depends on temperature, while wavelength applies when considering monochromatic radiation.
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