Chapters 10 and 11

Interaction and Empty Space Isn't Empty

• Quantum Electrodynamics is another important theory that helps explain how particles interact with each other
• Electrons can go backwards in time (when this happens they appear to be particles that have a positive charge)
• Empty space is potentially filled with Higgs boson particles and these particles give particles what we call mass because when other particles bump into the Higgs particle, they end up zigzagging throughout space. This zigzag is what gives particles mass.