With the help of modern telescopes, the angular diameters of two stars were measured, and it turned out that the first star

With the help of modern telescopes, the angular diameters of two stars were measured, and it turned out that the first star has it 10 times larger than the second. The surface temperature of the first star is half that of the second star. Which star shines brighter in our sky?

The first star is 6.25 times brighter.

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