We have on several occasions in this book noted the relationship between energy and size of particles. Large photons carry more energy than small ones. Electrons carry more energy than photons, etc. I will therefore propose that energy is size at the subatomic.

Specifically, we will define energy to be directly proportional to the surface area of subatomic particles.

It isn’t the speed of particles that carry energy. It’s their size. When we accelerate a particle, or lift it higher, it grows in size by a tiny bit.

It should be noted that this definition of energy is compatible with the principle of mass-energy equivalence, popularly known as E = mc².

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