1.

3. The radiation emitted by a star A is 10000 times that of thesun. If the surface temperatures of the sun and star A are6000 K and 2000 K respectively, the ratio of the radii ofthe star A and the sun is:(a) 300: 1(b) 600:1(c) 900:1(d) 1200:1​

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the ANSWER of this QUESTION is 4



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