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
see full answer
High-Paying Jobs That Even AI Can’t Replace — Through JEE/NEET
🎯 Hear from the experts why preparing for JEE/NEET today sets you up for future-proof, high-income careers tomorrow.
An Intiative by Sri Chaitanya
a
300 : 1
b
600 : 1
c
900 : 1
d
1200 : 1
answer is C.
(Unlock A.I Detailed Solution for FREE)
Best Courses for You
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Detailed Solution
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=900:1