Which characteristie is used to measure the amount of light radiated by a star? A: Size

B:Color

C:luminosity

D:Temperature

Luminosity

Luminosity is the amount of light that a star radiates. The size of the star and its surface temperature determine its luminosity. Apparent magnitude of a star is its perceived brightness, factoring in size and distance, while absolute magnitude is its true brightness irrespective of its distance from earth.

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;