Questions
A black body is heated from . The ratio of radiation emitted is
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a
1 : 256
b
1 : 27
c
1 : 16
d
1 : 64
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Correct option is C
Given: Initial temperature, T1 = 70C = 280 KFinal temperature, T2= 2870C = 560 KAccording to Stefan's law the radiated energy is given yE ∝ T4Hence E1E2 = T14T24 = (280560)4= 116 E1 : E2 = 1 : 16Similar Questions
For a black body at temperature 727°C, its radiating power is 60W and temperature of surrounding is 227° C. If temperature of black body is changed to 1227°C, then its
radiating power will be :
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