AKN / 

Learn about Particles 

What is a particle?
A particle is a collapsed wave function. (1)
A particle is a quantum exitation of a field. (1)
A particle is an irreducible representation of the Poincare group. (1)
A particle is an observed thing. (1)

What are types of particles? 
composite particles
elementary particles
pollen (2)
dust (2)
smoke (2)
bacteria 2)
viruses 2)

Resources
1. https://en.wikipedia.org/wiki/Subatomic_particle
2. https://www.youtube.com/watch?v=zly1OJuCPYY – at 28:39

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