The primary source of the energy radiated by a star,such as the sun,is
A) beta decay.
B) alpha decay.
C) fission reactions involving uranium.
D) fusion reactions in which hydrogen is fused to form helium.
E) fusion reactions in which helium is fused to form iron.

Question

Quizplus · Accepted Answer

The primary source of energy radiated by a star like the sun is through fusion reactions in which hydrogen atoms in the core of the star are fused together to form helium. This process releases a tremendous amount of energy in the form of light and heat, which is what makes the star shine. Beta decay and alpha decay do not occur in the core of the star, and fission reactions involving uranium are not a significant source of energy for stars. Fusion reactions in which helium is fused to form iron occur in later stages of a star's life cycle and are not the primary source of energy.

The Primary Source of the Energy Radiated by a Star,such