Part 7/10:
The validation of QED has facilitated predictions of various phenomena with unmatched precision. For instance, it has accurately described the hyperfine splitting in hydrogen atoms due to electron spins, and offered a remarkably precise prediction of the fine structure constant—demonstrating QED's prowess at accounting for the intricacies of quantum interactions.
The Extent of QED's Influence
QED’s success inspired further development within quantum field theory by extending similar principles to other elementary particles, including fermions (which follow the Pauli exclusion principle) and bosons. This evolution contributed to a broader understanding of fundamental forces and interactions in nature.