Why do nuclear fusion reactions only take place in the interior of a star (rather than at the surface)?
A) The magnetic fields are strongest there.
B) The temperature and density are highest in the centre.
C) The core is the only place where hydrogen is found.
D) The strong nuclear force is only active in the centres of stars.

Question

Quizplus · Accepted Answer

Nuclear fusion requires extremely high temperatures and pressures to overcome the electrostatic repulsion between atomic nuclei, allowing them to fuse. These conditions are only met in the core of a star, where the gravitational pressure creates the necessary temperature and density.

Why Do Nuclear Fusion Reactions Only Take Place in the Interior