College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

Exercise 35

The emissivity of an object is 0.50. (a) Compared with a perfect blackbody at /he same temperature, this object would radiate (1) more power, (2) the same amount of power, (3) less power. Why (b) Calculate the ratio of the power radiated by the blackbody to that radiated by the object.