PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
At a particular wavelength, surface P has absorptive power 0.9 while surface Q has absorptive power 0.3. Which surface is expected to have the higher emissivity at the same wavelength?
(a) Surface Q
(b) Both surfaces have equal emissivity
(c) Surface P
(d) Data are insufficient to decide