Questions
Assuming the sun to be a spherical body of radius R at a temperature of T K, evaluate the total radiant power, incident on earth, at a distance r from the sun:
Radius of earth is .
detailed solution
Correct option is D
Total radiant power =σ(4πR2)T44πr2=σR2T4r2Total radiant power incident on earth =σR2T4r2×πr02Talk to our academic expert!
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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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