The radiation emitted by a star A is 10,...

The radiation emitted by a star A is 10,000 times that of the sun. If the surface temperatures of the sun and the star A are 8000 K and 2000 K respectively. The ratio of the radii of the star A and the sun is

`1600:1`

`1800:1`

`16:1`

`25:1`

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