Questions
The radiation emitted by a star A is 1000 times that of the sun. If the surface temperatures of the sun and star A are 6000 K and 2000 K, respectively, the ratio of the radii of the star A and the sun is
detailed solution
Correct option is C
According to Stefan-Boltzmann law, the energy radiated per second through the surface of area A is given byE = σAT4 ∴ E1E2=A1A2T1T24 or 10000=r12r22200060004 or r12r22=(30)4 or r1:r2=900:1Talk to our academic expert!
Similar 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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