https://pm.haifa.ac.il/index.php?title=DelapazGailey98&action=history Revision history for this page on the wiki en MediaWiki 1.15.1 Mon, 07 Sep 2026 15:30:49 GMT https://pm.haifa.ac.il/index.php?title=DelapazGailey98&diff=146608&oldid=prev <p>Created page with &#39;Sodium Vapour Lamp consists of a discharge tube produced from a heat resistant glass, containing a small quantity of metallic sodium, neon gas and two electrodes, Neon gas is add…&#39;</p> <p><b>New page</b></p><div>Sodium Vapour Lamp consists of a discharge tube produced from a heat resistant glass, containing a small quantity of metallic sodium, neon gas and two electrodes, Neon gas is added to commence the discharge and to develop enough heat to vaporize the sodium. Simply because of law pressure inside the tube, a sufficiently long tube required to acquire a lot more light. To lessen the overall dimension of the lamp, this tube is typically bent into U-shape.<br /> <br /> The light produced by this lamp is yellowish which is made at its optimum pressure of about .004mm of mercury. This pressure is obtained at a temperature of about 280 C and so it becomes essential to preserve this temperature. For this purpose the U-tube is enclosed in a double walled flask to avert lose of heat. The double walled flask is interchangeable and can be fitted on to one more U-tube. Although replacing the inner U-tube one particular have to be really careful due to the fact if it is broken and sodium comes in speak to with moisture, it may result in fire.<br /> <br /> All electric discharge lamps demand a higher voltage at the time of starting and low voltage in the course of operation. Typically, sodium vapour lamps are operated by a high leakage reactance transformer. At beginning a high voltage of about 450 volts is applied across the lamp which is sufficient to start off the discharge. When the lamp is totally operative immediately after ten - 15 minutes, the voltage across it falls to about 150 volts. Due to the fact of the high reactance of circuit, the power element is low and hence a p.f improvement capacitor is connected.<br /> <br /> The efficiency of a low pressure sodium vapour lamp is really high (about 40 - 50 lumens/watt) and it produces a light of specific wavelength obtaining yellow color. Sodium lamps are primarily employed for street, high way and airfield lighting exactly where color distinction is not so needed. [http://newelectroniccigarettereview.com/ review of electronic cigarette] [http://newelectroniccigarettereview.com/ reviews for e cigarettes] [http://enterthecabin.com/electronic-cigarette-side-effects/ electronic cigarette side effects]</div> Thu, 23 Aug 2012 08:20:33 GMT DelapazGailey98 https://pm.haifa.ac.il/index.php?title=Talk:DelapazGailey98