Question

Luminosity is a property of a star that depends on:A. only the distance to the starB. only the amount of light given off by the starC. both the distance to the star and the light given off by the starD. neither the distance to the star nor the light given off by the star.

Answer 1

hmmm that’s kinda hard

Answer 2

The luminosity of a star is given by the following equation

`L=4\pi d^2b`

Where d is the distance from the star, and b its brightness in W/m^2. So, given this equation, we know that the correct option is letter C, as in our formula we have both the distance to the star and its light given off (brightness)