{"id":327,"date":"2023-08-14T20:27:07","date_gmt":"2023-08-15T03:27:07","guid":{"rendered":"https:\/\/dornsife.usc.edu\/lecture-support-lab\/?page_id=327"},"modified":"2023-09-18T12:44:12","modified_gmt":"2023-09-18T19:44:12","slug":"cathode-ray-tubes","status":"publish","type":"page","link":"https:\/\/dornsife.usc.edu\/lecture-support-lab\/cathode-ray-tubes\/","title":{"rendered":"Cathode Ray Tubes"},"content":{"rendered":"\n\n\n\n    \n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--accordions \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--accordions\"\n    \n      >\n\n    \n  \n      <ul>\n              <li>\n          <button type=\"button\" class=\"accordion-trigger \" id=\"heading-1-1-Qk1jSDM1VO\" aria-controls=\"section-1-1-Qk1jSDM1VO\" aria-expanded=\"false\" aria-disabled=\"false\">\n                          <span class=\"item-title\">MP.1(1) &#8211; Kinetic Energy Effect<\/span>\n            \n                      <\/button>\n\n          <div id=\"section-1-1-Qk1jSDM1VO\" role=\"region\" aria-labelledby=\"heading-1-1-Qk1jSDM1VO\" class=\"accordion-panel\">\n\n                            \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>This glass tube was evacuated and contains a light glass wheel with mica vanes mounted to roll on a glass track. When a high voltage is applied across the tube, electrons flow from one side to the other. They hit the mica vanes, turning the wheel that rolls along the glass track to the opposite side.<\/p>\n<p>The tube is mounted on a 15 cm tall stand and it is 20 cm in length.<\/p>\n<p><strong>NOTE<\/strong>: The mica vanes wheel does not seem to be affected much by the electrons.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-329 size-full\" src=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/mp2_2.jpg\" alt=\"Kinetic Energy Effect\" width=\"336\" height=\"286\" srcset=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/mp2_2.jpg 336w, https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/mp2_2-300x255.jpg 300w\" sizes=\"(max-width: 336px) 100vw, 336px\" \/> <img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-330 size-full\" src=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/mp2_2b.jpg\" alt=\"Kinetic Energy Effect\" width=\"432\" height=\"319\" srcset=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/mp2_2b.jpg 432w, https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/mp2_2b-300x222.jpg 300w\" sizes=\"(max-width: 432px) 100vw, 432px\" \/><\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n            \n                      <\/div>\n        <\/li>\n\n              <li>\n          <button type=\"button\" class=\"accordion-trigger \" id=\"heading-1-2-Qk1jSDM1VO\" aria-controls=\"section-1-2-Qk1jSDM1VO\" aria-expanded=\"false\" aria-disabled=\"false\">\n                          <span class=\"item-title\"> MP.1(2) &#8211; Shadow Effect &#8211; The Maltese Cross<\/span>\n            \n                      <\/button>\n\n          <div id=\"section-1-2-Qk1jSDM1VO\" role=\"region\" aria-labelledby=\"heading-1-2-Qk1jSDM1VO\" class=\"accordion-panel\">\n\n                            \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>This conical shaped tube has a metal Maltese cross near its wider end, that can be flipped vertically. A high voltage is applied between the cathode (narrow end of the tube) and the anode (on the support, mid-way through the tube). The cross will obstruct the electron flow, creating a shadow on the fluorescent screen at the end of the tube.<\/p>\n<p>The tube is mounted on a 15 cm tall stand and it is 20 cm in length.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-331 size-full\" src=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/mp2_3a.jpg\" alt=\"Shadow Effect - The Maltese Cross\" width=\"396\" height=\"334\" srcset=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/mp2_3a.jpg 396w, https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/mp2_3a-300x253.jpg 300w\" sizes=\"(max-width: 396px) 100vw, 396px\" \/> <img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-328 size-full\" src=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/MP.12.png\" alt=\"Shadow Effect - The Maltese Cross\" width=\"647\" height=\"335\" srcset=\"https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/MP.12.png 647w, https:\/\/dornsife.usc.edu\/lecture-support-lab\/wp-content\/uploads\/sites\/280\/2023\/08\/MP.12-300x155.png 300w\" sizes=\"(max-width: 647px) 100vw, 647px\" \/><\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n            \n                      <\/div>\n        <\/li>\n\n          <\/ul>\n  \n  \n\n  <\/div><\/div>\n\n\n\n  \n  \n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--two-column-ctas \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--two-column-ctas\"\n    \n      >\n\n    \n      <div class=\"group\">\n\n                  \n<div class=\"f--field f--section-title\">\n\n    \n  <h2>\n          Back to Modern Physics\n      <\/h2>\n\n\n<\/div>\n      \n              <ul>\n                      <li>\n                  \n<div class=\"f--field f--link\">\n\n    \n    \n  \n<a \n  class=\"link\"\n  href= https:\/\/dornsife.usc.edu\/lecture-support-lab\/modern-physics\/\n    aria-label=\"Read more about Modern Physics\"  \n>\n    Modern Physics \n  <svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" x=\"0px\" y=\"0px\" viewBox=\"0 0 35 35\" enable-background=\"new 0 0 35 35\" width=\"25\" height=\"25\" xml:space=\"preserve\"><polygon fill-rule=\"evenodd\" clip-rule=\"evenodd\" fill=\"#000\" points=\"19.3,27.5 29.3,17.5,19.3,7.5 16.3,10.4 21.4,15.4 6.7,15.4 6.7,19.6 21.4,19.6 16.3,24.6 \"\/><\/svg>\n<\/a>\n\n\n<\/div>\n            <\/li>\n                  <\/ul>\n      \n    <\/div>\n      <div class=\"group\">\n\n                  \n<div class=\"f--field f--section-title\">\n\n    \n  <h2>\n          Back to Home\n      <\/h2>\n\n\n<\/div>\n      \n              <ul>\n                      <li>\n                  \n<div class=\"f--field f--link\">\n\n    \n    \n  \n<a \n  class=\"link\"\n  href= https:\/\/dornsife.usc.edu\/lecture-support-lab\/\n    aria-label=\"Read more about Home Page\"  \n>\n    Home Page \n  <svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" x=\"0px\" y=\"0px\" viewBox=\"0 0 35 35\" enable-background=\"new 0 0 35 35\" width=\"25\" height=\"25\" xml:space=\"preserve\"><polygon fill-rule=\"evenodd\" clip-rule=\"evenodd\" fill=\"#000\" points=\"19.3,27.5 29.3,17.5,19.3,7.5 16.3,10.4 21.4,15.4 6.7,15.4 6.7,19.6 21.4,19.6 16.3,24.6 \"\/><\/svg>\n<\/a>\n\n\n<\/div>\n            <\/li>\n                  <\/ul>\n      \n    <\/div>\n  \n\n  <\/div><\/div>\n\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--spacer \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--spacer\"\n    \n      >\n\n    \n\n  <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":354,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-content-detail.php","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-327","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - 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