- published: 01 Jun 2009
- views: 1102
Visible light (commonly referred to simply as light) is electromagnetic radiation that is visible to the human eye, and is responsible for the sense of sight. Visible light has a wavelength in the range of about 380 nanometres to about 740 nm – between the invisible infrared, with longer wavelengths and the invisible ultraviolet, with shorter wavelengths.
Primary properties of visible light are intensity, propagation direction, frequency or wavelength spectrum, and polarisation, while its speed in a vacuum, 299,792,458 meters per second (about 300,000 kilometers per second), is one of the fundamental constants of nature. Visible light, as with all types of electromagnetic radiation (EMR) is experimentally found to move at exactly this same speed in vacuum.
In common with all types of EMR, visible light is emitted and absorbed in tiny "packets" called photons, and exhibits properties of both waves and particles. This property is referred to as the wave–particle duality. The study of light, known as optics, is an important research area in modern physics.
A demon is a supernatural, often malevolent being prevalent in various religions, occultisms, literature, and folklore. The original Greek word daimon does not carry the negative connotation initially understood by implementation of the Koine δαιμόνιον (daimonion), and later ascribed to any cognate words sharing the root.
In Ancient Near Eastern religions as well as in the Abrahamic traditions, including ancient and medieval Christian demonology, a demon is considered an "unclean spirit" which may cause demonic possession, calling for an exorcism. In Western occultism and Renaissance magic, which grew out of an amalgamation of Greco-Roman magic, Jewish demonology, and Christian tradition, a demon is a spiritual entity that may be conjured and controlled.
The Ancient Greek word δαίμων daimōn denotes a "spirit" or "divine power", much like the Latin genius or numen. Daimōn most likely came from the Greek verb daiesthai ("to divide, distribute"). The Greek conception of a daimōns notably appears in the works of Plato, where it describes the divine inspiration of Socrates. To distinguish the classical Greek concept from its later Christian interpretation, the former is usually anglicized as either daemon or daimon rather than demon.
[music and lyrics: Boeru]
Ashamed I rise from the unholy ground,
To fly beyond the frontiers of sound,
I slowly sink into infinity
So I can rise again as poetry.
They fly so high that they touch the sky,
They are the ones who walk the Sun...
They make the clouds bring the rain
And let the Moon rise again.
My demons fly...
They hang there, on the vault of my soul,
As mellow fruits on branches of a tree,
I pick them up as words of blasphemy,
My demons turn them into poetry.