Austrian-born Erwin Schrödinger made a great number of contributions to science during his lifetime, including wave mechanics theory. These discoveries and concepts about wave mechanics have been vital in modern understandings of subatomic particles and the movement and behavior of light. He also made pioneering advancements in the fields of genetic study and quantum physics.
Before Schrödinger made his numerous discoveries and developed his theories, not much was known about subatomic particles, and there was little understanding of their existence. In his time, Schrödinger wrote a number of papers that expanded the scientific community's understanding of the possibility of these particles. Beyond that, he showed the ways in which such particles could function with different types of energy levels. By utilizing his prowess with mechanical waves, Schrödinger even established a metric through which the behavior of these types of subatomic particles could be predicted. According to Famous Scientists, many people consider Schrödinger's great contribution to the scientific community to be his equation regarding subatomic particles.
Schrödinger also developed a famous illustration that demonstrates a thought experiment he developed. It involves a cat being placed in a box with a source of poison. This mind experiment stipulates that, for some time, to an outside observer, it is impossible to know whether the cat is alive or dead, so in some ways, it is both.