How to Use "luminosity" with Example Sentences

1. Specifically , luminosity is proportional to radius squared .
2. Specifically , the luminosity of a star is proportional to temperature to the fourth power .
3. In principle , one can trace that history back in cosmic time by observing a so-called standard candle , a class of astronomical object whose intrinsic luminosity is uniform .
4. And if octopuses , cuttlefish and squid-and some of their predators and prey-can see polarized light so keenly , are they also using it , as they use color and luminosity , to actively create camouflage ?