as a star's size increases, its luminosity _. As a star's temperature _. its luminosity increases.

1 answer

As a star's size increases, its luminosity generally increases. This is because larger stars have a greater surface area from which to emit light and heat, leading to higher overall energy output.

As a star's temperature increases, its luminosity also increases. This relationship is described by the Stefan-Boltzmann Law, which states that the luminosity of a star is proportional to the fourth power of its temperature (in Kelvin). Therefore, higher temperatures result in significantly higher luminosity.

In summary:

  • As a star's size increases, its luminosity increases.
  • As a star's temperature increases, its luminosity increases.