circular lamp I

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• Circular dichroism — (CD) refers to the differential absorption of left and right circularly polarized light.[1][2] This phenomenon was discovered by Jean Baptiste Biot, Augustin Fresnel, and Aimé Cotton in the first half of the 19th century.[3] It is exhibited in… …   Wikipedia

• lamp — lampless, adj. /lamp/, n. 1. any of various devices furnishing artificial light, as by electricity or gas. Cf. fluorescent lamp, incandescent lamp. 2. a container for an inflammable liquid, as oil, which is burned at a wick as a means of… …   Universalium

• lamp shells — ▪ animal Introduction also called  brachiopod,         any member of the phylum Brachiopoda, a group of bottom dwelling marine invertebrates. They are covered by two valves, or shells; one valve covers the dorsal, or top, side; the other covers… …   Universalium

• Oil lamp — Neolithic stone lamps in Thousand Lamp Museum in Qiandeng town of Kunshan …   Wikipedia

• Compact fluorescent lamp — Low energy light bulb redirects here. For other low energy bulbs, see LED lamp. The tubular type compact fluorescent lamp is one of the most popular types in Europe …   Wikipedia

• Kerosene lamp — The kerosene lamp (widely known in Britain as a paraffin lamp) is any type of lighting device which uses kerosene (paraffin) as a fuel. There are two main types of kerosene lamp which work in different ways, the wick lamp and the pressure lamp… …   Wikipedia

• ḤANUKKAH LAMP — (also known as ḥanukkiyyah and Ḥanukkah menorah). The central ritual of the eight day Festival of Ḥanukkah is the kindling of a lamp that has receptacles for eight lights, one for each night. A ninth receptacle, called the servitor or shammash,… …   Encyclopedia of Judaism

• Argand lamp — The Argand lamp was invented and patented in 1780 by Aimé Argand. It greatly improved on the home lighting oil lamp of the day by producing a light equivalent to about 6 to 10 candles. It had a circular wick mounted between two cylindrical metal… …   Wikipedia

• Mosque lamp — from Egypt, c. 1360 Mosque lamps of glass, enamelled and often with gilding, survive in considerable numbers from the Islamic art of the Middle Ages, especially the 13th and 14th centuries, with Cairo in Egypt and Aleppo and Damascus in Syria the …   Wikipedia

• Xenon flash lamp — A xenon flash lamp is an electric glow discharge lamp designed to produce extremely intense, incoherent, full spectrum white light for very short durations. Construction The lamp comprises a sealed tube, often made of fused quartz, which is… …   Wikipedia

• Argand lamp — Ar gand lamp [Named from the inventor, Aim[ e] Argand of Geneva.] A lamp with a circular hollow wick and glass chimney which allow a current of air both inside and outside of the flame. [1913 Webster] {Argand burner}, a burner for an Argand lamp …   The Collaborative International Dictionary of English