NEET2007PhysicsThermal Properties of MatterActual
Assuming the sun to have a spherical outer surface of radius r , radiating like a black body at temperature t^ C , the power received by a unit surface, (normal to the incident rays) at a distance R from the centre of the sun is: where is the Stefan's constant
Options
- Ar^2 (t+273)^4 4 R^2
- B16 ^2 r^2 t^4 R^2
- Cr^2 (t+273)^4 R^2
- D4 r^2 t^4 R^2
Correct answer
C. r^2 (t+273)^4 R^2
Step-by-step solution
aligned Solar constant & = (4 r^2 ) T^4 (4 R^2 ) & = r^2(t+273)^4 R^2 aligned