Question

3. The radiation emitted by a star A is 10000 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:
(a) 300: 1
(b) 600:1
(c) 900:1
(d) 1200:1​

Answer 1

the answer of this question is 4