Coherer - Law Dictionary Search Results
Home Dictionary Name: cohererCoherer
Any device in which an imperfectly conducting contact between pieces of metal or other conductors loosely resting against each other is materially improved in conductivity by the influence of Hertzian waves so called by Sir O J Lodge in 1894 on the assumption that the impact of the electic waves caused the loosely connected parts to cohere or weld together a condition easily destroyed by tapping A common form of coherer as used in wireless telegraphy consists of a tube containing filings usually a pinch of nickel and silver filings in equal parts between terminal wires or plugs called conductor plugs...
coherent light
Light in which the phases of all electromagnetic waves at each point on a line normal to the direction of the the beam are identical Coherent light is usually monochromatic and the most common source of such light for practical uses is from a laser...
Coherently
In a coherent manner...
Decoherer
A device for restoring a coherer to its normal condition after it has been affected by an electric wave a process usually accomplished by some method of tapping or shaking or by rotation of the coherer...
hologram
A photographic image giving the observer a seemingly three dimensional view of the represented object The three dimensional effect is produced by exposing a photographic recording medium to an interference pattern generated by a coherent beam of light as from a laser reflected from the subject interacting with a beam directly from the source The full three dimensional effect requires illumination of the image with coherent light but less perfect three dimensional visual effects may also be observed when the hologram is illuminated with white light...
laser
A device which produces an intense usually narrow monochromatic beam of coherent light called also optical maser It has various forms and is used in various applications in science and technology The beam is produced by boosting the majority of the electrons in specific radiation absorbing atoms in a medium into a higher energy level from which they are stimulated by their own emitted radiation to drop back synchronously to their lower energy level and emit light which is in phase coherent...
Chalaza
The place on an ovule or seed where its outer coats cohere with each other and the nucleus...
Coalescent
Growing together cohering as in the organic cohesion of similar parts uniting...
Cohere
To stick together to cleave to be united to hold fast as parts of the same mass...
Coherence
A sticking or cleaving together union of parts of the same body cohesion...
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