Question

The Kirchoff's law leads to the conclusion that the good radiators of thermal radiations are

• A. good absorbers
• B. bad absorbers
• C. thermal insulators
• D. none of these

Answer 1

The correct option is A good absorbers

Kirchoffs Law states that the emissivity of a surface is equal to its absorbance, where the absorbance of a surface is the ratio of the radiant power absorbed to the radiant power incident on the surface. It concludes that good radiators of thermal radiations good absorbers.
option (A) is the correct answer