{"id":4430,"date":"2016-05-16T09:49:00","date_gmt":"2016-05-16T04:19:00","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-dual-nature-of-radiation-and-matter-part-1\/"},"modified":"2018-10-22T11:49:29","modified_gmt":"2018-10-22T06:19:29","slug":"ncert-solutions-class-12-physics-dual-nature-of-radiation-and-matter","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-dual-nature-of-radiation-and-matter\/","title":{"rendered":"NCERT Solutions class 12 physics Dual Nature of Radiation and Matter Part 1"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-dual-nature-of-radiation-and-matter\/#NCERT_Class_12_Physics_Chapter-wise_Solutions\" >NCERT Class 12 Physics Chapter-wise Solutions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-dual-nature-of-radiation-and-matter\/#CHAPTER_11_DUAL_NATURE_OF_RADIATION_AND_MATTER\" >CHAPTER 11 DUAL NATURE OF RADIATION AND MATTER<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-dual-nature-of-radiation-and-matter\/#NCERT_Solutions_class_12_physics_Dual_Nature_of_Radiation_and_Matter_Part_1\" >NCERT Solutions class 12 physics Dual Nature of Radiation and Matter Part 1\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-dual-nature-of-radiation-and-matter\/#NCERT_Solutions_for_Class_12_Physics\" >NCERT Solutions for Class 12 Physics<\/a><\/li><\/ul><\/nav><\/div>\n<p>NCERT Solutions class 12 physics Dual Nature of Radiation and Matter Part 1 Class 12 Physics book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE board exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT textbooks. Class 12 Physics chapter wise NCERT solution for Physics part 1 and Physics part 2 for all the chapters can be downloaded from our website and myCBSEguide mobile app for free.<\/p>\n<p style=\"text-align: center;\"><strong>Download\u00a0<a href=\"https:\/\/mycbseguide.com\/downloads\/cbse-class-12-physics\/1251\/ncert-solutions\/5\/\">NCERT solutions for Dual Nature of Radiation and Matter Part 1\u00a0<\/a>as PDF.<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright\" src=\"https:\/\/media-mycbseguide.s3.ap-south-1.amazonaws.com\/images\/blog\/Class%2012%20physics%20book%2012.jpg\" alt=\"NCERT Solutions class 12 physics Dual Nature of Radiation and Matter Part 1\" width=\"135\" height=\"165\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Class_12_Physics_Chapter-wise_Solutions\"><\/span>NCERT Class 12 Physics Chapter-wise Solutions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>1 \u2013 Electric Charges and Fields<\/li>\n<li>2 \u2013 Electrostatic Potential and Capacitance<\/li>\n<li>3 \u2013 Current Electricity<\/li>\n<li>4 \u2013 Moving Charges and Magnetism<\/li>\n<li>5 \u2013 Magnetism and Matter<\/li>\n<li>6 \u2013 Electromagnetic Induction<\/li>\n<li>7 \u2013 Alternating Current<\/li>\n<li>8 \u2013 Electromagnetic Waves<\/li>\n<li>9 \u2013 Ray Optics and Optical Instruments<\/li>\n<li>10 \u2013 Wave Optics<\/li>\n<li>11 \u2013 Dual Nature of Radiation and Matter<\/li>\n<li>12 \u2013 Atoms<\/li>\n<li>13 \u2013 Nuclei<\/li>\n<li>14 \u2013 Semiconductor Electronic: Material, Devices and Simple Circuits<\/li>\n<li>15 \u2013 Communication Systems<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"CHAPTER_11_DUAL_NATURE_OF_RADIATION_AND_MATTER\"><\/span>CHAPTER 11 DUAL NATURE OF RADIATION AND MATTER<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>11.1 Introduction<\/li>\n<li>11.2 Electron Emission<\/li>\n<li>11.3 Photoelectric Effect<\/li>\n<li>11.4 Experimental Study of Photoelectric Effect<\/li>\n<li>11.5 Photoelectric Effect and Wave Theory of Light<\/li>\n<li>11.6 Einstein\u2019s Photoelectric Equation: Energy Quantum of Radiation<\/li>\n<li>11.7 Particle Nature of Light: The Photon<\/li>\n<li>11.8 Wave Nature of Matter<\/li>\n<li>11.9 Davisson and Germer Experiment<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Solutions_class_12_physics_Dual_Nature_of_Radiation_and_Matter_Part_1\"><\/span>NCERT Solutions class 12 physics Dual Nature of Radiation and Matter Part 1<strong>\u00a0<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>1: Find the<\/p>\n<p>(a) maximum frequency, and<\/p>\n<p>(b) minimum wavelength of X-rays produced by 30 kV electrons.<\/p>\n<p>2:\u00a0The work function of caesium metal is 2.14 eV. When light of frequency <img decoding=\"async\" style=\"height: 21px; width: 49px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch11\/image010.png\" \/>Hz is incident on the metal surface, photoemission of electrons occurs. What is the<\/p>\n<p>(a) maximum kinetic energy of the emitted electrons,<\/p>\n<p>(b) Stopping potential, and<\/p>\n<p>(c) maximum speed of the emitted photoelectrons?<\/p>\n<p>3:\u00a0The photoelectric cut-off voltage in a certain experiment is 1.5 V. What is the maximum kinetic energy of photoelectrons emitted?<\/p>\n<p>4:\u00a0Monochromatic light of wavelength 632.8 nm is produced by a helium-neon laser. The power emitted is 9.42 mW.<\/p>\n<p>(a) Find the energy and momentum of each photon in the light beam,<\/p>\n<p>(b) How many photons per second, on the average, arrive at a target irradiated by this beam? (Assume the beam to have uniform cross-section which is less than the target area), and<\/p>\n<p>(c) How fast does a hydrogen atom have to travel in order to have the same momentum as that of the photon?<\/p>\n<p>5:\u00a0The energy flux of sunlight reaching the surface of the earth is <img decoding=\"async\" style=\"height: 21px; width: 71px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch11\/image045.png\" \/><img decoding=\"async\" style=\"height: 21px; width: 51px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch11\/image046.png\" \/>. How many photons (nearly) per square metre are incident on the Earth per second? Assume that the photons in the sunlight have an average wavelength of 550 nm.<\/p>\n<p>6:\u00a0In an experiment on photoelectric effect, the slope of the cut-off voltage versus frequency of incident light is found to be <img decoding=\"async\" style=\"height: 21px; width: 75px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch11\/image054.png\" \/>V s. Calculate the value of Planck&#8217;s constant.<\/p>\n<p>7:\u00a0A 100 W sodium lamp radiates energy uniformly in all directions. The lamp is located at the centre of a large sphere that absorbs all the sodium light which is incident on it. The wavelength of the sodium light is 589 nm. (a) What is the energy per photon associated with the sodium light? (b) At what rate are the photons delivered to the sphere?<\/p>\n<p>8:\u00a0The threshold frequency for a certain metal is<img decoding=\"async\" style=\"height: 21px; width: 60px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch11\/image069.png\" \/>\u00a0Hz. If light of frequency<img decoding=\"async\" style=\"height: 21px; width: 60px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch11\/image070.png\" \/>\u00a0Hz is incident on the metal, predict the cutoff voltage for the photoelectric emission.<\/p>\n<p>9:\u00a0The work function for a certain metal is 4.2 eV. Will this metal give photoelectric emission for incident radiation of wavelength 330 nm?<\/p>\n<p>10:\u00a0Light of frequency <img decoding=\"async\" style=\"height: 21px; width: 66px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch11\/image084.png\" \/>Hz is incident on a metal surface. Electrons with a maximum speed of <img decoding=\"async\" style=\"height: 21px; width: 56px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch11\/image085.png\" \/>m\/s are ejected from the surface. What is the threshold frequency for photoemission of electrons?<\/p>\n<p>11:\u00a0 Light of wavelength 488 nm is produced by an argon laser which is used in the photoelectric effect. When light from this spectral line is incident on the emitter, the stopping (cut-off) potential of photoelectrons is 0.38 V. Find the work function of the material from which the emitter is made.<\/p>\n<p>12:\u00a0Calculate the<\/p>\n<p>(a) momentum, and<\/p>\n<p>(b) de Broglie wavelength of the electrons accelerated through a potential difference of 56 V.<\/p>\n<p>13:\u00a0What is the<\/p>\n<p>(a) momentum,<\/p>\n<p>(b) speed, and<\/p>\n<p>(c) de Broglie wavelength of an electron with kinetic energy of 120 eV.<\/p>\n<p>14:\u00a0The wavelength of light from the spectral emission line of sodium is 589 nm. Find the kinetic energy at which<\/p>\n<p>(a) an electron, and<\/p>\n<p>(b) a neutron, would have the same de Broglie wavelength<strong>. <\/strong><\/p>\n<p>15:\u00a0 What is the de Broglie wavelength of<\/p>\n<p>(a) a bullet of mass 0.040 kg travelling at the speed of 1.0 km\/s,<\/p>\n<p>(b) a ball of mass 0.060 kg moving at a speed of 1.0 m\/s, and<\/p>\n<p>(c) a dust particle of mass <img decoding=\"async\" style=\"height: 21px; width: 68px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch11\/image149.png\" \/>kg drifting with a speed of 2.2 m\/s?<\/p>\n<p>16: An electron and a photon each have a wavelength of 1.00 nm. Find<\/p>\n<p>(a) their momenta,<\/p>\n<p>(b) the energy of the photon, and<\/p>\n<p>(c) the kinetic energy of electron.<\/p>\n<p>17:\u00a0(a) For what kinetic energy of a neutron will the associated de Broglie wavelength be <img decoding=\"async\" style=\"height: 18px; width: 107px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/12\/physics\/ch11\/image169.png\" \/> ?<\/p>\n<p>(b) Also find the de Broglie wavelength of a neutron, in thermal equilibrium with matter, having an average kinetic energy of (3\/2) <em>kT<\/em> at 300 K.<\/p>\n<p>18:\u00a0 Show that the wavelength of electromagnetic radiation is equal to the de Broglie wavelength of its quantum (photon).<\/p>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Solutions_for_Class_12_Physics\"><\/span><strong>NCERT Solutions for Class 12 Physics<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>NCERT Solutions Class 12 Physics PDF (Download) Free from myCBSEguide app and myCBSEguide website. Ncert solution class 12 physics includes text book solutions from both part 1 and part 2. NCERT Solutions for CBSE Class 12 Physics have total 20 chapters. 12 Physics NCERT Solutions in PDF for free Download on our website. Ncert physics class 12 solutions PDF and physics ncert class 12 PDF solutions with latest modifications and as per the latest CBSE syllabus are only available in myCBSEguide<\/p>\n<p>To download\u00a0NCERT Solutions for class 12 Physics, Chemistry, Biology, History, Political Science, Economics, Geography, Computer Science, Home Science, Accountancy, Business Studies and Home Science; do check myCBSEguide app or website. myCBSEguide provides sample papers with solution, test papers for chapter-wise practice, NCERT solutions, NCERT Exemplar solutions, quick revision notes for ready reference, CBSE guess papers and CBSE important question papers. Sample Paper all are made available through\u00a0<a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide&amp;referrer=utm_source%3Dmycbse_bottom%26utm_medium%3Dtext%26utm_campaign%3Dmycbseads\"><strong>the best app for CBSE students<\/strong><\/a>\u00a0and myCBSEguide website.<\/p>\n<hr \/>\n","protected":false},"excerpt":{"rendered":"<p>NCERT Solutions class 12 physics Dual Nature of Radiation and Matter Part 1 Class 12 Physics book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE board exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked &#8230; <a title=\"NCERT Solutions class 12 physics Dual Nature of Radiation and Matter Part 1\" class=\"read-more\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-class-12-physics-dual-nature-of-radiation-and-matter\/\" aria-label=\"More on NCERT Solutions class 12 physics Dual Nature of Radiation and Matter Part 1\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":-1,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[281,1433],"tags":[283,1342,216,319],"class_list":["post-4430","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ncert-solutions","category-physics-cbse-class-12","tag-cbse-study-material","tag-class-12","tag-ncert-solutions","tag-physics"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>NCERT Solutions class 12 physics Dual Nature of Radiation and Matter<\/title>\n<meta name=\"description\" content=\"NCERT Solutions class 12 physics Dual Nature of Radiation and Matter in PDF format for free download. 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