22. Compare the rates of emission of heat by a blackbody maintained at 727 C and at 227'C, if the blackbodies are surrounded by an enclosure (black) at 27 C. What would be the ratio of their rates of loss of heat ? [Ans: 18.23:1]23. Earth's mean temperature can be assumed to be 280 K. How will the curve of blackbody radiation look like for this temperature? Find out 2 In which max part of the electromagnetic spectrum, does this value lie? [Ans: 1.035 x 105m, microwave region]