[amp_mcq option1=”1 Photo emissive cathode & 2 dynodes” option2=”2 Photo emissive cathodes & 2 dynodes” option3=”2 Photo emissive cathodes & 1 dynode” option4=”1 Photo emissive cathode & 1 dynode” correct=”option1″]<\/p>\n
The correct answer is: A. 1 Photo emissive cathode & 2 dynodes<\/p>\n
A photomultiplier is a vacuum tube that uses a series of dynodes to amplify the current produced by a single photon. The first dynode is coated with a material that emits electrons when struck by a photon. These electrons are then accelerated by a voltage difference between the first dynode and the second dynode. When the electrons strike the second dynode, they cause the emission of more electrons, which are then accelerated to the third dynode, and so on. This process of multiplication can be repeated many times, resulting in a large amplification of the original signal.<\/p>\n
Photomultipliers are used in a variety of applications, including astronomy, spectroscopy, and medical imaging. They are also used in some types of light meters and photoelectric cells.<\/p>\n
Here is a brief explanation of each option:<\/p>\n
[amp_mcq option1=”1 Photo emissive cathode & 2 dynodes” option2=”2 Photo emissive cathodes & 2 dynodes” option3=”2 Photo emissive cathodes & 1 dynode” option4=”1 Photo emissive cathode & 1 dynode” correct=”option1″]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[740],"tags":[],"class_list":["post-55182","post","type-post","status-publish","format-standard","hentry","category-electronics-and-instrumentation","no-featured-image-padding"],"yoast_head":"\n