- Pál Szalai (Wikipedia)
Pál Szalai (September 3, 1915 – January 16, 1994) also spelled Pál Szalay and later anglicized as Paul Sterling was a high-ranking Hungarian police officer and reinstated member of the Arrow Cross Party after 1944. In 1945, together with Swedish diplomat Raoul Wallenberg, Szalai helped save hundreds of Hungarian Jews in the Budapest ghetto. In 2009, he was honored by Israel as Righteous among the Nations.
- Wave–particle duality (Wikipedia)
Wave–particle duality is the concept in quantum mechanics that quantum entities exhibit particle or wave properties according to the experimental circumstances. It expresses the inability of the classical concepts such as particle or wave to fully describe the behavior of quantum objects. During the 19th and early 20th centuries, light was found to behave as a wave, and then later discovered to have a particulate character, whereas electrons were found to act as particles, and then later discovered to have wavelike aspects. The concept of duality arose to name these contradictions.