The total radiant energy per unit area, normal to the direction of incidence, received at a distance R from the center of a star of radius r whose outer surface radiates as a black body at a temperature TK is given by (where 
is Stefan’s constant)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
According to the Stefan Boltzmann law, the power radiated by the star whose outer surface
radiates as a black body at temperature 
is given by
where, 
radius of the star
’s constant
The radiant power per unit area received at a distance R from the center of a star is
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