Читать книгу String Theory For Dummies - Andrew Zimmerman Jones - Страница 103

In the 19th century, the physical understanding of the nature of light changed completely. Experiments began to show strong cases where light acts like waves instead of particles, which contradicted Newton (see the “Optics: Shedding light on light’s properties” section for more on Newton’s findings). During the same time, experiments into electricity and magnetism began to reveal that these forces behave like light, except we can’t see them.

By the end of the 19th century, it became clear that electricity and magnetism are different manifestations of the same force: electromagnetism. One of the goals of string theory is to develop a single theory that incorporates both electromagnetism and gravity.