Quantum Electrodynamics: A quick review

Based on Introduction to Elementary Particles– by David Griffiths. You can also watch Fermilab’s excellent introduction to QED here:

Unification of Forces so far

I have already discussed the four fundamental forces of nature and attempts to unify them in a single theory that explains everything in my post on Fundamental Interactions. As a supplement to that, given below is a summary of how

Particle Physics: The Fundamental Interactions

As per standard model, there are certain elementary particles and interactions that are at the heart of every process in nature: What are Interactions? Loosely speaking, these interactions are nothing but “forces” as we know them in rest of the