Question

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

Answer 1

Option B

Step-by-step 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.

Answer 2

B: emits more light than a low luminosity star

Step-by-step explanation:

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.