Ads
related to: halo color changing recessed lights
Search results
Results from the WOW.Com Content Network
LED halo rings use bright light-emitting diodes. Because of a unique nature of LED lights that are made of layers of semiconductor material and can emit light of various colors depending on how these materials are chemically grouped, LED halo rings can change the light color on demand.
A halo (from Ancient Greek ἅλως (hálōs) 'threshing floor, disk') [1] is an optical phenomenon produced by light (typically from the Sun or Moon) interacting with ice crystals suspended in the atmosphere. Halos can have many forms, ranging from colored or white rings to arcs and spots in the sky.
The light that forms the CZA enters an ice crystal through its flat top face, and exits through a side prism face. The refraction of almost-parallel sunlight through what is essentially a 90-degree prism accounts for the wide color separation and the purity of color. The CZA can only form when the sun is at an altitude lower than 32.2°. [5]
Apart from the presence of ice-containing clouds in the right position in the sky, the halo requires that the light source (Sun or Moon) be very high in the sky, at an elevation of 58° or greater. This means that the solar variety of the halo is impossible to see at locations north of 55°N or south of 55°S.
The colour change of halochromic substances occur when the chemical binds to existing hydrogen and hydroxide ions in solution. [1] Such bonds result in changes in the conjugated systems of the molecule, or the range of electron flow. This alters the wavelength of light absorbed, which in turn results in a visible change of colour.
Nicole Kidman might still be blushing over some of the scenes she filmed in her new erotic thriller Babygirl, but the film's director said the actress never wavered about the sexual material ...
Ads
related to: halo color changing recessed lights