For a given body at a particular temperature, its coefficients of reflection and transmission are 0.63 and 0.21 respectively. Then its coefficient of emission at the same temperature will be
0.16
0.32
0.84
0.36
Next Question
A body of surface area 25 × 10-3 m2 emits 0.4 Kcal of heat in 20 s at 50°C. What is the emissive power of the body at that temperature?