{"id":26486,"date":"2024-09-10T01:55:21","date_gmt":"2024-09-09T20:25:21","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=26486"},"modified":"2025-04-08T02:29:54","modified_gmt":"2025-04-07T20:59:54","slug":"photoelectric-effect","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/photoelectric-effect\/","title":{"rendered":"What is Photoelectric Effect?"},"content":{"rendered":"<h2><strong>About Photoelectric Effect:<\/strong><\/h2>\n<ul>\n<li>It is a phenomenon where <strong>electrons<\/strong> are <strong>emitted from<\/strong> a <strong>material\u2019s surface when <\/strong>it is <strong>exposed to light<\/strong> of sufficient frequency.\n<ul>\n<li><strong>When light photons hit<\/strong> the surface of <strong>a material<\/strong>, usually a metal, they <strong>transfer their energy to <\/strong>the <strong>electrons<\/strong>. If this energy is sufficient, the <strong>electrons are emitted from the material.<\/strong><\/li>\n<li>The <strong>energy must be greater than<\/strong> the <strong>electron\u2019s binding energy<\/strong>, known as the <strong>work function<\/strong>, for the electron to be ejected from the material\u2019s surface.<\/li>\n<li>The <strong>excess energy<\/strong> from the photon, after overcoming the work function, is <strong>converted into<\/strong> the <strong>kinetic energy of the ejected electron.<\/strong><\/li>\n<\/ul>\n<\/li>\n<li><strong>A material<\/strong> that can <strong>exhibit this phenomenon<\/strong> is <strong>said to be photo emissive<\/strong>, and the <strong>ejected electrons<\/strong> are <strong>called photoelectrons.<\/strong><\/li>\n<li>The effect was <strong>discovered in 1887 by<\/strong> the German physicist <strong>Heinrich Rudolf Hertz.\u00a0<\/strong><\/li>\n<li>The photoelectric effect is <strong>pivotal in understanding<\/strong> the <strong>quantum nature of light<\/strong>, as it reveals that light possesses both wave-like and particle-like properties.<\/li>\n<li>This duality is a <strong>cornerstone of quantum mechanics<\/strong>, illustrating how light can exhibit behaviors characteristic of both waves and discrete particles.<\/li>\n<li>The discovery and understanding of the photoelectric effect have profound implications in various scientific and technological fields, including the <strong>development of photovoltaic cells and advanced imaging technologies.\u00a0<\/strong><\/li>\n<\/ul>\n<hr \/>\n<h3><strong>Q1<\/strong>: What is a photovoltaic cell?<\/h3>\n<p>A photovoltaic (PV) cell, commonly called a solar cell, is a non mechanical device that converts sunlight directly into electricity. Some PV cells can convert artificial light into electricity.<\/p>\n<p><strong>Source: <\/strong><a href=\"https:\/\/epaper.thehindu.com\/ccidist-ws\/th\/th_delhi\/issues\/98766\/OPS\/G3RDAB7VQ.1+G33DAB88O.1.html\" target=\"_blank\" rel=\"nofollow noopener\">Superfast studies of photoelectric effect reveal the secrets of matter<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Photoelectric Effect is a phenomenon where electrons are emitted from a material\u2019s surface when it is exposed to light of sufficient frequency. <\/p>\n","protected":false},"author":5,"featured_media":26487,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-26486","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/26486","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=26486"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/26486\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/26487"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=26486"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=26486"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=26486"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}