Question

compare the rates of emission of heat by black body at 727°C and 227°C​

Answer 1

Explanation:

Given Compare the rates of emission of heat by black body at 727°C and 227°C.If the black body is surrounded by enclosure (black) at 27 degree Celsius, what would be the ratio of their rates of loss of heat?

• Temperature of first black body = 727 + 273 = 1000 K
• Temperature of second black body = 227 + 273 500 k
• Also temperature of surrounding = 27 + 273 = 300 k
• Rate of loss of heat is directly proportional to the difference in temperature of the black body ans the surrounding.
• So first body P = 1000 – 300 = 700
• So second body P1 = 500 – 300 = 200
• Therefore ratio will be 700 / 200 = 7/2

                                                  = 7 : 2

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