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Analogously, Socrates says, as the sun illuminates the visible with light so the idea of goodness illuminates the intelligible with truth, which in turn makes it possible for people to have knowledge. Also, as the eye's ability to see is made possible by the light of the Sun so the soul's ability to know is made possible by the truth of goodness.
6th century BCE – Anaximander conceives a mechanical, non-mythological model of the world: the Earth floats very still in the centre of the infinite, not supported by anything. [7] Its curious shape is that of a cylinder [8] with a height one-third of its diameter. The flat top forms the inhabited world, which is surrounded by a circular ...
The topos of "light and darkness" is also reflected in numerous titles in popular culture, such as Heart of Darkness (1899), Light in My Darkness (1927), Darkness and the Light (1942), Creatures of Light and Darkness (1969), Darkness to Light (1973), Darkness and Light (1989), The Lord of the Light and of the Darkness (1993), the Star Trek ...
In the Book of Optics, al-Haytham hypothesized the existence of primary and secondary light, with primary light being the stronger or more intense of the two.The book describes how the essential form of light comes from self-luminous bodies and that accidental light comes from objects that obtain and emit light from those self-luminous bodies.
1746 – Leonhard Euler develops the wave theory of light refraction and dispersion 1747 – William Watson , while experimenting with a Leyden jar, observes that a discharge of static electricity causes electric current to flow and develops the concept of an electrical potential ( voltage ).
Here's how faint dwarf galaxies, revealed by JWST, sparked the reionization epoch and ended the universe's dark ages with their powerful radiation.
The Separation of Light from Darkness is based on verses 3–5 from the first chapter of the Book of Genesis: 3 And God said, "Let there be light," and there was light. 4 God saw that the light was good, and he separated the light from the darkness. 5 God called the light "day," and the darkness he called "night." And there was evening, and ...
Hamilton's optico-mechanical analogy is a conceptual parallel between trajectories in classical mechanics and wavefronts in optics, introduced by William Rowan Hamilton around 1831. [1] It may be viewed as linking Huygens' principle of optics with Maupertuis' principle of mechanics.