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A photon (from Ancient Greek φῶς, φωτός (phôs, phōtós) 'light') is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force.
The apeiron is central to the cosmological theory created by Anaximander, a 6th-century BC pre-Socratic Greek philosopher whose work is mostly lost. From the few existing fragments, we learn that he believed the beginning or ultimate reality is eternal and infinite, or boundless (apeiron), subject to neither old age nor decay, which perpetually yields fresh materials from which everything we ...
The ancient Greek word for element, stoicheion (from stoicheo, "to line up") meant "smallest division (of a sun-dial), a syllable", as the composing unit of an alphabet it could denote a letter and the smallest unit from which a word is formed.
According to Anaxagoras the cosmos is made of infinitely divisible matter, every bit of which can inherently become anything, except Mind (nous), which is also matter, but which can only be found separated from this general mixture, or else mixed into living things, or in other words in the Greek terminology of the time, things with a soul ...
This famous aphorism used to characterize Heraclitus' thought comes from Simplicius, a Neoplatonist, and from Plato's Cratylus. The word rhei (ρέι, cf. rheology) is the Greek word for "to stream"; according to Plato's Cratylus, it is related to the etymology of Rhea. πάντοτε ζητεῖν τὴν ἀλήθειαν
Optics began with the development of lenses by the ancient Egyptians and Mesopotamians, followed by theories on light and vision developed by ancient Greek philosophers, and the development of geometrical optics in the Greco-Roman world. The word optics is derived from the Greek term τα ὀπτικά meaning 'appearance, look'. [1]
The motion of light was a long-standing investigation in physics for hundreds of years before the 20th century. The use of aether to describe this motion was popular during the 17th and 18th centuries, including a theory proposed by Johann II Bernoulli , who was recognized in 1736 with the prize of the French Academy.
The term monad comes from the Greek feminine noun monas (nominative singular, μονάς), "one unit," where the ending -s in the nominative form resolves to the ending -d in declension. [ 2 ] Prominent early Christian gnostics like Valentinus taught that the Monad is the high source of the Pleroma , the region of light constituting "the ...