By the 19th century physics was realized as a positive science and a distinct discipline separate from philosophy and the other sciences.

Heisenberg's uncertainty principle is one of the most important results of twentieth century physics.

Davy's experiments are often cited as a classic example of the methods used in 19th century physics and chemistry research.

To appreciate why this is different from awakening after any night's sleep requires a brief reprise of 20th century physics.

And in effect, the history of twentieth century physics is marked by a paradigm where probability reigns.

Consequently, resolving the inconsistencies between both theories has been a major goal of 20th and 21st century physics.

Tyndall published seventeen books, which brought state-of-the-art 19th century experimental physics to a wider audience.

In addition to scientific papers she has published scholarly papers and a book on history of 20th century physics.

Even in the eighteenth century physics and chemistry were still classified as "natural philosophy", that is, the philosophical study of nature.

Designing experiments to test the properties of the aether was a high priority of 19th century physics.