Question

How does fusion make energy?

Answer 1

1. Fusion is the process of joining light nuclei together (typically hydrogen-like nuclei). Energy is released since the larger nuclei once more require less energy to keep it together.
2. This is what occurs in the Sun and stars, and tokamaks and stellarators are being used in studies to learn how to harness fusion energy on Earth.
3. At extremely high temperatures and pressures, fusion occurs when smaller nuclei join together to produce a bigger nucleus. Compared to the energy released during fission, fusion energy is substantially higher.

According to Einstein's equation: $E=m{c}^2$, the energy $E$, mass $m$, and speed of light $\left(c\right)$ are all expressed in SI units as Joules, kilograms, and meters per second, respectively.

If the mass is transformed into energy, it may either take the form of heat or the kinetic energy of other masses.

Thus, fusion makes energy by converting some amount of mass into energy.