!!install!! | Applications Of Modern Physics

"Positron Emission Tomography" is literally powered by antimatter . Doctors inject a radioactive tracer that releases positrons; when these meet electrons in your body, they annihilate and produce gamma rays that the scanner detects to find tumors.

When Einstein proposed in 1917 (the theoretical foundation of the laser), it was a purely theoretical curiosity. For 40 years, it was "a solution looking for a problem." Today, lasers are ubiquitous. Applications Of Modern Physics

Providing roughly 10% of the world's electricity, fission harnesses the energy released when heavy nuclei split. Applications Of Modern Physics