- 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.
- Papua New Guinea (Wikipedia)
Papua New Guinea, officially the Independent State of Papua New Guinea, is a country in Oceania that comprises the eastern half of the island of New Guinea and its offshore islands in Melanesia (a region of the southwestern Pacific Ocean north of Australia). It shares its only land border with Indonesia to the west and its other close neighbours are Australia to the south and the Solomon Islands to the east. Its capital, located on its southern coast, is Port Moresby. The country is the world’s third largest island country, with an area of 462,840 km2 (178,700 sq mi).