Q. A hot body will radiate heat most rapidly if its surface is
A) White & polished
B) White & rough
C) Black & polished
D) Black & rough
Explanation
(d) Black and rough surfaces are good absorber that’s why they emit well. (Kirchhoff’s law)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.