{"id":3589,"date":"2022-01-14T19:37:11","date_gmt":"2022-01-14T19:37:11","guid":{"rendered":"https:\/\/physics.educour.in\/isc-physics\/?p=3589"},"modified":"2022-09-03T14:25:36","modified_gmt":"2022-09-03T14:25:36","slug":"quantum-theory-of-radiation","status":"publish","type":"post","link":"https:\/\/physics.educour.in\/isc-physics\/quantum-theory-of-radiation\/","title":{"rendered":"QUANTUM THEORY OF RADIATION"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"3589\" class=\"elementor elementor-3589\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-bfd5eec elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"bfd5eec\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-bf6c70b\" data-id=\"bf6c70b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3118a9f elementor-widget elementor-widget-text-editor\" data-id=\"3118a9f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h1><span style=\"color: #000080;\">Quantum Theory of Radiation<\/span><\/h1>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2304ee4 elementor-widget elementor-widget-text-editor\" data-id=\"2304ee4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Contents<\/h3>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ec461ee elementor-widget elementor-widget-text-editor\" data-id=\"ec461ee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ol><li><a href=\"#quantum-theory\">Planck&#8217;s Quantum Theory of Radiation<\/a><\/li><li><a href=\"#properties\">Properties of photons<\/a><\/li><li><a href=\"#quantum-theory-video\">Video lecture on Quantum Theory<\/a><\/li><li><a href=\"#numerical-problems\">Numerical Problems on Quantum Theory of Radiation.<\/a><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-253187e elementor-widget elementor-widget-text-editor\" data-id=\"253187e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2><span style=\"color: #000080;\">Introduction:<\/span><\/h2>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9d58f71 elementor-widget elementor-widget-text-editor\" data-id=\"9d58f71\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>By the end of 19<sup>th<\/sup> century, although Maxwell\u2019s theory of Electromagnetic wave successfully explained the phenomena like interference, diffraction, polarization etc., it failed to explain various other phenomena like photoelectric effect, distribution of energy in the spectrum of black body radiation, presence of spectral lines in the spectrum of hydrogen of atom etc.<\/p><p>Further, although Wien, Rayleigh and Jeans were partially successful in explaining the energy distribution in black body radiation there was a significant discrepancy between the predictions from the classical theory and the experimentally observed spectral emissivity curves of black body radiation. To reconcile this discrepancy, Planck put forward his Quantum Theory of Radiation. The quantum theory of radiation becomes widely accepted only when Einstein used it to explain Photoelectric effect.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-264c25d elementor-widget elementor-widget-menu-anchor\" data-id=\"264c25d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"menu-anchor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-menu-anchor\" id=\"quantum-theory\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f629a19 elementor-widget elementor-widget-text-editor\" data-id=\"f629a19\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2><span style=\"color: #000080;\">Plank&#8217;s Quantum Theory:<\/span><\/h2>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3b2922d elementor-widget elementor-widget-text-editor\" data-id=\"3b2922d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>According to Planck\u2019s quantum theory of radiation, the radiations come out of a source and also interact with matter in the form of discrete energy packets, called \u2018photons\u2019 or \u2018quanta\u2019. Each photon contains a specific amount of energy depending upon the wavelength (frequency) of radiation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ad20680 elementor-widget elementor-widget-menu-anchor\" data-id=\"ad20680\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"menu-anchor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-menu-anchor\" id=\"properties\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-320f1a0 elementor-widget elementor-widget-text-editor\" data-id=\"320f1a0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3><strong>Properties of Photons<\/strong><\/h3>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a6ef447 elementor-widget elementor-widget-image\" data-id=\"a6ef447\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/physics.educour.in\/cbse-physics\/wp-content\/uploads\/2022\/01\/properties-1.jpg\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6ab193f elementor-widget elementor-widget-image\" data-id=\"6ab193f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/physics.educour.in\/cbse-physics\/wp-content\/uploads\/2022\/01\/properties-2.jpg\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6a70134 elementor-widget elementor-widget-image\" data-id=\"6a70134\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/physics.educour.in\/cbse-physics\/wp-content\/uploads\/2022\/01\/properties-3.jpg\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-976b952 elementor-widget elementor-widget-text-editor\" data-id=\"976b952\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: center;\"><span style=\"font-size: 14pt; color: #ff0000;\"><span style=\"font-size: 18pt; color: #000080;\">Lecture Video<\/span>[In Hindi+English Language]<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-263a8fb elementor-widget elementor-widget-menu-anchor\" data-id=\"263a8fb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"menu-anchor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-menu-anchor\" id=\"quantum-theory-video\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a0ea6b8 elementor-widget elementor-widget-image\" data-id=\"a0ea6b8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/physics.educour.in\/isc-physics\/introduction-to-quantum-theory-of-radiation-video\/\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"740\" height=\"420\" src=\"https:\/\/physics.educour.in\/isc-physics\/wp-content\/uploads\/2022\/01\/Introduction-to-Quantum-Theory-of-radiation.jpg\" class=\"attachment-large size-large wp-image-3977\" alt=\"\" srcset=\"https:\/\/physics.educour.in\/isc-physics\/wp-content\/uploads\/2022\/01\/Introduction-to-Quantum-Theory-of-radiation.jpg 740w, https:\/\/physics.educour.in\/isc-physics\/wp-content\/uploads\/2022\/01\/Introduction-to-Quantum-Theory-of-radiation-300x170.jpg 300w\" sizes=\"(max-width: 740px) 100vw, 740px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-56f5d4d elementor-widget elementor-widget-text-editor\" data-id=\"56f5d4d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Lecture Notes<\/h3>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6b4de24 elementor-widget elementor-widget-image\" data-id=\"6b4de24\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/physics.educour.in\/cbse-physics\/wp-content\/uploads\/2022\/01\/1.jpg\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-73f0569 elementor-widget elementor-widget-image\" data-id=\"73f0569\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/physics.educour.in\/cbse-physics\/wp-content\/uploads\/2022\/01\/2.jpg\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b05c875 elementor-widget elementor-widget-image\" data-id=\"b05c875\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/physics.educour.in\/cbse-physics\/wp-content\/uploads\/2022\/01\/2b.jpg\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c99fac1 elementor-widget elementor-widget-image\" data-id=\"c99fac1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/physics.educour.in\/cbse-physics\/wp-content\/uploads\/2022\/01\/3.jpg\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4c5a246 elementor-widget elementor-widget-image\" data-id=\"4c5a246\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/physics.educour.in\/cbse-physics\/wp-content\/uploads\/2022\/01\/4.jpg\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bfd7c27 elementor-widget elementor-widget-image\" data-id=\"bfd7c27\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/physics.educour.in\/cbse-physics\/wp-content\/uploads\/2022\/01\/6.jpg\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-69aaa13 elementor-widget elementor-widget-text-editor\" data-id=\"69aaa13\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2 style=\"text-align: center;\">Numerical Problems on Quantum Theory of Radiation<\/h2>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7b95b35 elementor-widget elementor-widget-menu-anchor\" data-id=\"7b95b35\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"menu-anchor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-menu-anchor\" id=\"numerical-problems\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b098334 elementor-widget elementor-widget-text-editor\" data-id=\"b098334\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: center;\"><span style=\"font-size: 14pt; color: #ff0000;\"><span style=\"font-size: 18pt; color: #000080;\">Lecture Video<\/span>[In Hindi+English Language]<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3e71f47 elementor-widget elementor-widget-image\" data-id=\"3e71f47\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/physics.educour.in\/isc-physics\/numerical-problems-on-quantum-theory-of-radiation-video\/\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"854\" height=\"480\" src=\"https:\/\/physics.educour.in\/isc-physics\/wp-content\/uploads\/2022\/01\/Numerical-Problems-on-Quantum-theory-of-radiation.jpg\" class=\"attachment-large size-large wp-image-3978\" alt=\"\" srcset=\"https:\/\/physics.educour.in\/isc-physics\/wp-content\/uploads\/2022\/01\/Numerical-Problems-on-Quantum-theory-of-radiation.jpg 854w, https:\/\/physics.educour.in\/isc-physics\/wp-content\/uploads\/2022\/01\/Numerical-Problems-on-Quantum-theory-of-radiation-300x169.jpg 300w, https:\/\/physics.educour.in\/isc-physics\/wp-content\/uploads\/2022\/01\/Numerical-Problems-on-Quantum-theory-of-radiation-768x432.jpg 768w\" sizes=\"(max-width: 854px) 100vw, 854px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9786960 elementor-widget elementor-widget-text-editor\" data-id=\"9786960\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Lecture Notes (Numerical Problems)<\/h3>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-82abb23 elementor-widget elementor-widget-image\" data-id=\"82abb23\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/physics.educour.in\/cbse-physics\/wp-content\/uploads\/2022\/01\/Numerical-Quantum-theory-of-radiation-1.jpg\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-408cf39 elementor-widget elementor-widget-image\" data-id=\"408cf39\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/physics.educour.in\/cbse-physics\/wp-content\/uploads\/2022\/01\/Numerical-Quantum-theory-of-Radiation-2.jpg\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8c643a9 elementor-widget elementor-widget-image\" data-id=\"8c643a9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/physics.educour.in\/cbse-physics\/wp-content\/uploads\/2022\/01\/Numerical-Quantum-theory-of-Radiation-3.jpg\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f6f0aa7 elementor-widget elementor-widget-image\" data-id=\"f6f0aa7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/physics.educour.in\/cbse-physics\/wp-content\/uploads\/2022\/01\/Numerical-Quantum-theory-of-Radiation-5.jpg\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-70d8401 elementor-widget elementor-widget-image\" data-id=\"70d8401\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/physics.educour.in\/cbse-physics\/wp-content\/uploads\/2022\/01\/Numerical-Quantum-theory-of-Radiation-6.jpg\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7e2293f elementor-widget elementor-widget-image\" data-id=\"7e2293f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/physics.educour.in\/cbse-physics\/wp-content\/uploads\/2022\/01\/Numerical-Quantum-theory-of-Radiation-7.jpg\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Quantum Theory of Radiation Contents Planck&#8217;s Quantum Theory of Radiation Properties of photons Video lecture on Quantum Theory Numerical Problems on Quantum Theory of Radiation. Introduction: By the end of 19th century, although Maxwell\u2019s theory of Electromagnetic wave successfully explained the phenomena like interference, diffraction, polarization etc., it failed to explain various other phenomena like &#8230; <a title=\"QUANTUM THEORY OF RADIATION\" class=\"read-more\" href=\"https:\/\/physics.educour.in\/isc-physics\/quantum-theory-of-radiation\/\" aria-label=\"More on QUANTUM THEORY OF RADIATION\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"post_folder":[27],"class_list":["post-3589","post","type-post","status-publish","format-standard","hentry","category-11-lecture-notes"],"_links":{"self":[{"href":"https:\/\/physics.educour.in\/isc-physics\/wp-json\/wp\/v2\/posts\/3589","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/physics.educour.in\/isc-physics\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/physics.educour.in\/isc-physics\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/physics.educour.in\/isc-physics\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/physics.educour.in\/isc-physics\/wp-json\/wp\/v2\/comments?post=3589"}],"version-history":[{"count":36,"href":"https:\/\/physics.educour.in\/isc-physics\/wp-json\/wp\/v2\/posts\/3589\/revisions"}],"predecessor-version":[{"id":8382,"href":"https:\/\/physics.educour.in\/isc-physics\/wp-json\/wp\/v2\/posts\/3589\/revisions\/8382"}],"wp:attachment":[{"href":"https:\/\/physics.educour.in\/isc-physics\/wp-json\/wp\/v2\/media?parent=3589"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/physics.educour.in\/isc-physics\/wp-json\/wp\/v2\/categories?post=3589"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/physics.educour.in\/isc-physics\/wp-json\/wp\/v2\/tags?post=3589"},{"taxonomy":"post_folder","embeddable":true,"href":"https:\/\/physics.educour.in\/isc-physics\/wp-json\/wp\/v2\/post_folder?post=3589"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}