Energy emitted from stars is the result of fusion.
What is fusion?
Fusion is a process where two or more atoms combined together to form a new molecule.
As in the question it is stated that Luminosity is the amount of energy emitted by a star each second is true, because of the fusion of hydrogen atoms to helium atom and high amount of energy is released in the form of light. And Stars radiate light over a broad range of frequencies in the electromagnetic spectrum, from the low energy radio waves to high energy gamma rays.
Hence, due to fusion energy is emitted from stars in the luminous.
To learn more about fusion, visit below link:
https://brainly.com/question/890176
