Coherent Light - Law Dictionary Search Results
Home Dictionary Name: coherent lightcoherent 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...
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...
Coherer
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...
holography
The process of producing holograms usually requiring a source of coherent light as from a laser...
lase
To give off a beam of coherent light of a laser...
Coherently
In a coherent manner...
Red light
an electrically operated set of lights at a road intersection which has different lights visible to traffic from different directions designed to control vehicle traffic through the intersection Each set of lights typically has a colored red light and also green and amber lights the color of the light which is lighted at any one time changes automatically to control the flow of traffic through the intersection allowing flow from different directions in alternating succession Also called traffic light traffic signal or stop light When the red light is illuminated the signal means to stop green means to go and amber means to stop or procede through the intersection with caution In simple intersections of two roads a red light visible to traffic on one road will usually be accompanied by a green light visible to traffic on the intersecting road In some locations the lights may be set to be illuminated in other sequences or combinations a blinking red light is typically equivalent to a ldq...
Electric lighting
Electric lighting. The supply of electricity for light-ing is facilitated and regulated by the (English) Electric Lighting Act, 1882 (45 & 46 Vict. c. 56). Under this Act powers may be obtained either (1) by license from the Board of Trade; or (2) by Provisional Order of the Board of Trade, needing confirmation by special Act of Parliament; or (3) by special Act of Parliament. The (English) Electric Lighting Clauses Act, 1899 (62 & 63 Vict. c. 19), has incorporated in one Act the usual clauses of provisional orders and special Acts, and directed that such clauses are to apply to every undertaking under the Electric Lighting Acts except so far as expressly varied. These licenses and orders may either be granted to the local authorities themselves or, with their consent, to independent contractors. Licenses continue in force for any period not exceeding seven years, but are renewable. By s. 27 of the (English) 1882 Act an undertaking autho-rized by provisional order or special Act may be...
Light
Light. No right to have the access of the sun's rays to one's windows free from any obstruction exists at Common Law (see DAMNUM ABSQUE INJURIA) but by virtue of the (English) Prescription Act, 1832 (2 & 3 Wm. 4, c. 71), uninterrupted enjoyment of light for twenty years--commonly called 'ancient lights' --constitutes in every case an absolute and indefeasible right to it, unless the enjoyment took place under some deed or written consent or agreement, Hyman v. Van Den Bergh, (1908) 1 Ch 167. See PRESCRIPTION.The Prescription Act has not altered the previous law as to ancient lights, Colls v. Home and Colonial Stores, 1904 AC 179. And the right is to uninterrupted access of such light only as is ordinarily required for ordinary purposes and not to light peculiarly appropriate to the particular purpose for which the light has been used [ibid., overruling Warren v. Brown, (1900) 2 QB 722], and see also Price v. Hildich, (1930) 1 Ch 500.If two tenements belong to a common landlord, the rig...
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