A large luminosity star ... A: is always at a larger distance than a small luminosity star B: emits more light than a low luminosity star C: is always redder than a star with a small luminosity D: is at a lower temperature than a small luminosity star E: is always at a smaller distance than a small luminosity star

Luminosity is an absolute measure of radiated electromagnetic power, the radiant power emitted by light scattering object. A star with large luminosity will have more measure of radiated electromagnetic power meaning it will emit more light than a low luminosity star. Luminosity has nothing to do with the color of star or distance.

Rest all options are wrong and only option b fits appropriate in the explaination above.

ConcepcionPetillo ConcepcionPetillo · Answer 2 · 2019-11-20T12:03:57+01:00

Answer:

Option B

Explanation:

Luminosity of the star can be defined as the amount of light that is emitted from star's surface.

Luminosity of a star is an intrinsic characteristic trait of a star and does not vary with the distance, it remains same for a particular star.
It is not the luminosity but the apparent brightness of the star that vary with the distance.
The larger the surface of the star, the more the emitted light form it and hence greater luminosity.
The more the surface are of the star, the more nuclear reactions it will have and hence, the temperature will be higher.