How Close Are We to the Theory of Everything?— Gravity and Quantum Gravity
<p>If you want to explain the universe and what goes on in it, we have couple tools at our disposal. If you want to explain atoms and subatomic particles, electromagnetism and nuclear forces, which are the basis of everything, the tool you will use is Quantum Field Theory (In theoretical physics, quantum field theory “QFT” is a theoretical framework that combines classical field theory, special relativity, and quantum mechanics). If you want to explain larger objects, you will need to use the General Theory of Relativity, the tool loved by classical physicists.</p>
<p>If you say I want to explain everything with a single theory, that will be the Theory of Everything, which is the dream of every physicist. Here is the problem. We have these two theories that work perfectly, but is the theory of everything two different theories? Of course not. We may or may not see it, but there must be only a theory.</p>
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