{"id":168,"date":"2022-06-06T15:57:46","date_gmt":"2022-06-06T19:57:46","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/?post_type=chapter&#038;p=168"},"modified":"2022-06-16T13:48:17","modified_gmt":"2022-06-16T17:48:17","slug":"arc-tube","status":"publish","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/chapter\/arc-tube\/","title":{"raw":"Arc Tube","rendered":"Arc Tube"},"content":{"raw":"All gas discharge lamps have a chamber which is filled with a gas, and where two electrodes of opposite polarity at either end of the arc tube pass an electric current between them. The space where this happens is called the <strong>Arc Chamber<\/strong>, or <strong>Arc Tube<\/strong>.\r\n\r\nFor <strong>Fluorescent<\/strong> lamps, the entire length of the lamp is the arc tube, while for the <strong>HID<\/strong> lamps the arc tube is much smaller.\r\n\r\n[caption id=\"attachment_254\" align=\"aligncenter\" width=\"1024\"]<img class=\"wp-image-254 size-large\" src=\"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/06\/Arc-tubes-1024x567.png\" alt=\"\" width=\"1024\" height=\"567\" \/> Arc tubes of various lamps[\/caption]\r\n\r\nThe electrodes at either end of the tube are called <strong>cathodes<\/strong>, and they are directly connected to the external circuitry of the lamp.\r\n\r\nAll visible and invisible waves of EM radiation are produced in the arc tube by moving electrons crashing into the gas that fills the arc chamber. As the electrons impart energy to the atoms of the gas, they emit energy in the form of visible light. All light is produced by collisions between electrons and the atoms of the gas that fills the lamp.","rendered":"<p>All gas discharge lamps have a chamber which is filled with a gas, and where two electrodes of opposite polarity at either end of the arc tube pass an electric current between them. The space where this happens is called the <strong>Arc Chamber<\/strong>, or <strong>Arc Tube<\/strong>.<\/p>\n<p>For <strong>Fluorescent<\/strong> lamps, the entire length of the lamp is the arc tube, while for the <strong>HID<\/strong> lamps the arc tube is much smaller.<\/p>\n<figure id=\"attachment_254\" aria-describedby=\"caption-attachment-254\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-254 size-large\" src=\"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/06\/Arc-tubes-1024x567.png\" alt=\"\" width=\"1024\" height=\"567\" srcset=\"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/06\/Arc-tubes-1024x567.png 1024w, https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/06\/Arc-tubes-300x166.png 300w, https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/06\/Arc-tubes-768x426.png 768w, https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/06\/Arc-tubes-65x36.png 65w, https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/06\/Arc-tubes-225x125.png 225w, https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/06\/Arc-tubes-350x194.png 350w, https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/06\/Arc-tubes.png 1220w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption id=\"caption-attachment-254\" class=\"wp-caption-text\">Arc tubes of various lamps<\/figcaption><\/figure>\n<p>The electrodes at either end of the tube are called <strong>cathodes<\/strong>, and they are directly connected to the external circuitry of the lamp.<\/p>\n<p>All visible and invisible waves of EM radiation are produced in the arc tube by moving electrons crashing into the gas that fills the arc chamber. As the electrons impart energy to the atoms of the gas, they emit energy in the form of visible light. All light is produced by collisions between electrons and the atoms of the gas that fills the lamp.<\/p>\n","protected":false},"author":848,"menu_order":3,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":["aaron"],"pb_section_license":""},"chapter-type":[],"contributor":[60],"license":[],"class_list":["post-168","chapter","type-chapter","status-publish","hentry","contributor-aaron"],"part":153,"_links":{"self":[{"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/chapters\/168","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/wp\/v2\/users\/848"}],"version-history":[{"count":2,"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/chapters\/168\/revisions"}],"predecessor-version":[{"id":255,"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/chapters\/168\/revisions\/255"}],"part":[{"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/parts\/153"}],"metadata":[{"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/chapters\/168\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/wp\/v2\/media?parent=168"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/chapter-type?post=168"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/wp\/v2\/contributor?post=168"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/wp\/v2\/license?post=168"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}