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Fusion Simplified Revision Notes

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Fusion (Physics)

Introduction

  • Fusion is a fundamental nuclear process in which two atomic nuclei combine to form a nucleus with a larger mass number.

Key Concepts

  • Nuclear Fusion: Fusion involves the merging of atomic nuclei to create a nucleus of higher mass.
  • Stellar Fusion: Fusion is the primary nuclear process that powers stars like the Sun, where hydrogen nuclei combine to form helium nuclei.
  • Energy Release: Fusion reactions release a substantial amount of energy in the form of kinetic energy.
  • E=mc²: Albert Einstein's famous equation, E=mc², demonstrates the equivalence of mass and energy, where energy (E) is related to mass (m) by the speed of light (c).

Fusion Process

Fusion Process Diagram

  • In nuclear fusion, two atomic nuclei, often hydrogen isotopes, collide and fuse to create a new, heavier nucleus.
  • For example, the fusion of hydrogen-1 and hydrogen-2 nuclei forms helium-3.

Stellar Fusion

Stellar Fusion Diagram

  • Fusion reactions are the primary energy source for stars like the Sun.
  • In the Sun's core, hydrogen nuclei combine to form helium through a series of fusion reactions, releasing vast amounts of energy in the form of light and heat.

Energy Release

  • Fusion reactions release energy in the form of kinetic energy of the resulting nucleus and emitted particles.
  • This energy can be harnessed for various applications, including the development of advanced energy sources.

Fusion (Physics)

Diagram

E=mc² Equation

  • Albert Einstein's equation, E=mc², states that energy (E) is proportional to mass (m) and the square of the speed of light (c).
  • It highlights the concept that mass can be converted into energy and vice versa, illustrating the immense energy potential in fusion reactions.

Summary

  • Fusion is a nuclear process where two atomic nuclei combine to create a nucleus with a higher mass number.
  • Fusion reactions are the main source of energy in stars like the Sun.
  • Fusion reactions release energy, which can be harnessed for various applications.
  • Albert Einstein's equation, E=mc², demonstrates the relationship between mass and energy, emphasising the significant energy potential of fusion.
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