A black body radiates energy at the rate of 1 ´ 105 J / s ´m2 at tem – McqOptions

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1.	A black body radiates energy at the rate of 1 ´ 105 J / s ´m2 at temperature of 227o C. The temperature to which it must be heated so that it radiates energy at rate of 1 ´ 109J/sm2, is [DPMT 2004]
A.	5000 K
B.	5000 oC
C.	500 K
D.	500 oC
Answer» B. 5000 oC

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