The laws of the Photoelectric effect are as follows: 1. J.J. Thomson and Sir William Crookes studied the discharge of electricity through gases. With respect to Quantum theory of matter, De Broglie postulated the relationship between momentum and wavelength. The notes are based on CBSE Syllabus. Questions on Dual Nature of Matter is extremely important topic of Physics for students of 10+2 (Non – Medical, Medical ) . Physics MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. The energy of a Quantum is directly proportional to the radiation frequency. As the name suggests Dual Nature of Matter and Radiation chapter deals with the duality in the nature of matter, namely particle nature and a wave nature. What happens in the process is when light is made to be incident on the metal surface, some of the electrons which are present near the surface will absorb enough energy from the incident radiation and thus overcomes the attraction of the positive ions. The smallest packet of energy is called Quantum. Dual Nature of Matter and Radiation is one of the most important chapters from modern physics while preparing for all competitive exam because it helps you to understand the dual nature of matter. This concept further helps to modify the inability of the classical mechanic’s approach or theories to fully describe the behaviour of the matter. Important Topics: Important topics from Dual Nature of Radiation and Matter for boards are Planck's idea, Hertz and Lenard's Experiment, Threshold Frequency and Wave Function. Basic facts is constant , independent of nature of material used e = charge on electron m = mass of electron We know that Energy = q V One electron volt is the energy gained by electron when it is accelerated by 1 Volt of potential difference 1 ev = 1.602 ×10–19 J Effect of Potential on Photoelectric Current is that it increases with increase in Potential applied to the collector for a fixed frequency and intensity of incident light, and finally attains maximum current termed as Saturation Current. Bernoulli equation derivation with examples and applications, Continuity equation derivation in fluid mechanics with applications, Newton’s law of universal gravitation formula, Newton’s First law of Motion Examples in Our Daily Life, Newton’s Second Law Definition and Formula, Newton’s Third Law of Motion Examples in Daily Life, Newton’s three laws of motion with examples and applications, Ampere’s law and its applications in daily life, Formula for ohm’s law with example and problems. Schrodinger time independent wave equation derivation, Difference Between Stress and Strain in Tabular Form. The nature of the experiment determines whether a wave or a particle description is best suited for understanding the experimental result. Click here. Free PDF download of Physics Class 12 Chapter 11 - Dual Nature of Radiation and Matter Formulas Prepared by Expert Teachers at Vedantu.com. When we apply heat to a black body, it results in the emission of thermal radiations having different wavelengths or frequency. However, the certain other phenomenon such as black body radiation and photoelectric effect can be explained only on the basis of its particle nature. In case of light some phenomenon like diffraction and interference can be explained on the basis of its wave character. NCERT Solutions for Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Exercises Solutions and Additional Exercises Solutions to study online without downloading for new academic session 2020-2021. Save my name, email, and website in this browser for the next time I comment. Electrostatic Particle Accelerator: Two oppositely charged plates are employed to accelerate the electrons at a known potential. And with the help of either wave nature or particle nature, we can … Dual Nature Of Radiation And Matter. I can't seem to understand the dual nature of matter completely. ORIGIN OF THEORY The idea of duality originated in a debate over the nature of light and matter that dates back to the 17th century, when competing theories of light were proposed by Christian Huygens and Isaac Newton: light was thought either to consist of waves … Basic facts  is constant, independent of nature of material used e = charge on electron m = mass of electron We know that Energy = q V One electron volt is the energy gained by electron when it is accelerated by 1 … Substances absorb or radiate energy in a discontinuous manner. Class 12 NCERT/CBSE board notes for Dual Nature Of Matter And Radiation. Click here. It is clear from next topic that Compton effect confirm the validity of p = h/λ for photons, and the photoelectric effect confirms the validity and E = hν for photons. Dual Nature of Radiation and Matter Class 12 Notes Chapter 11. Practice NEET Important Chapterwise Questions solved by our expert teachers helps to score good marks in NEET Medical Exams. The waves associated with moving particles are matter waves or de-Broglie waves. Click here. Physicswallah Typed Notes. Click here. The kinetic energy K of the electron equals the work done on it by the electric field which equals to qV. 2,968 Dual Nature of Matter and X - Rays Complete Physics Course - Class 11 OFFERED PRICE: Rs. 2. The minimum negative potential given to anode plate at which photoelectric current becomes zero is called Stopping Potential (V0). Target: It is a Nickel crystal over which the electron beam is fired. The main highlights of the theory include: Consider an electron of mass m, with a charge q being accelerated through a potential V from rest. Dual Nature of Matter Lewis de-Broglie proposed the dual nature of the matter in 1924 and stated that just like radiation, matter also has dual characteristics. Audience. The experiments in which measure the e/m of electron indicate that the electron must be regarded as particle,But the electron diffraction experiments of Davission and Germer and the G.P thomson indicate that the electron must be regarded as a wave.In 1932 Stern performed experiments which showed that moving atoms or molecules behave as waves.Thus the wave property of moving electrons must also be attributed to all other particles of matter,protons,neytrons,atoms and molecules etc. According to the de Broglie concept of matter waves, the matter has dual nature. For photoelectric emission, ƛ < ƛ0 and f > f0. For 1 marker and MCQ for class 12 boards, conceptual questions from these topics as well as threshold frequency and wave function can be asked. Physicswallah Typed Notes. 1. Your email address will not be published. Various experiments by various scientists were done to prove it. Click here. According to Neil Bohr “The wave and particle aspects of quantum entity are both necessary for a complete description.However the two aspects cannot be revealed simultaneously in a single experiment.The aspect which is revealed is determined by nature of experiment being done. If radiation shows dual aspects, so should matter. He presented the concept of dual nature of matter which was based on the following observations. Field Emission: Electrons are kept under the strong influence of the electric field to emit the electron out of the metal. What is De Broglie Hypothesis about Dual nature of matter? Later, it was found experimentally that matter does possess the properties of a wave. Questions on Dual Nature of Matter is extremely important topic of Physics for students of 10+2 (Non – Medical, Medical ) . Usually, the surface of the material is composed of both positive and negative ions. This particular fact led De broglie to make in 1924 a daring suggestion that if light which is known to consists of waves can under certain situations assume the aspect of particle then the particle  should also behave like a wave.He based his reasoning on the assumption that nature possesses symmetry and that the two physical entities matter and wave must be symmetrical also.De broglie took quantum idea of emission of energy of photon of radiation of frequency is given by: Dual nature of matter 1. The properties of diffraction and interference indicated that light consists of waves.But the photoelectric effect and compton effect indicate that light consists of particles which are called photon.Thus light has dual nature behaves like particles as well as waves. The main parts consist as given below: CBSE Previous Year Question Papers Class 10, CBSE Previous Year Question Papers Class 12, NCERT Solutions Class 11 Business Studies, NCERT Solutions Class 12 Business Studies, NCERT Solutions Class 12 Accountancy Part 1, NCERT Solutions Class 12 Accountancy Part 2, NCERT Solutions For Class 6 Social Science, NCERT Solutions for Class 7 Social Science, NCERT Solutions for Class 8 Social Science, NCERT Solutions For Class 9 Social Science, NCERT Solutions For Class 9 Maths Chapter 1, NCERT Solutions For Class 9 Maths Chapter 2, NCERT Solutions For Class 9 Maths Chapter 3, NCERT Solutions For Class 9 Maths Chapter 4, NCERT Solutions For Class 9 Maths Chapter 5, NCERT Solutions For Class 9 Maths Chapter 6, NCERT Solutions For Class 9 Maths Chapter 7, NCERT Solutions For Class 9 Maths Chapter 8, NCERT Solutions For Class 9 Maths Chapter 9, NCERT Solutions For Class 9 Maths Chapter 10, NCERT Solutions For Class 9 Maths Chapter 11, NCERT Solutions For Class 9 Maths Chapter 12, NCERT Solutions For Class 9 Maths Chapter 13, NCERT Solutions For Class 9 Maths Chapter 14, NCERT Solutions For Class 9 Maths Chapter 15, NCERT Solutions for Class 9 Science Chapter 1, NCERT Solutions for Class 9 Science Chapter 2, NCERT Solutions for Class 9 Science Chapter 3, NCERT Solutions for Class 9 Science Chapter 4, NCERT Solutions for Class 9 Science Chapter 5, NCERT Solutions for Class 9 Science Chapter 6, NCERT Solutions for Class 9 Science Chapter 7, NCERT Solutions for Class 9 Science Chapter 8, NCERT Solutions for Class 9 Science Chapter 9, NCERT Solutions for Class 9 Science Chapter 10, NCERT Solutions for Class 9 Science Chapter 12, NCERT Solutions for Class 9 Science Chapter 11, NCERT Solutions for Class 9 Science Chapter 13, NCERT Solutions for Class 9 Science Chapter 14, NCERT Solutions for Class 9 Science Chapter 15, NCERT Solutions for Class 10 Social Science, NCERT Solutions for Class 10 Maths Chapter 1, NCERT Solutions for Class 10 Maths Chapter 2, NCERT Solutions for Class 10 Maths Chapter 3, NCERT Solutions for Class 10 Maths Chapter 4, NCERT Solutions for Class 10 Maths Chapter 5, NCERT Solutions for Class 10 Maths Chapter 6, NCERT Solutions for Class 10 Maths Chapter 7, NCERT Solutions for Class 10 Maths Chapter 8, NCERT Solutions for Class 10 Maths Chapter 9, NCERT Solutions for Class 10 Maths Chapter 10, NCERT Solutions for Class 10 Maths Chapter 11, NCERT Solutions for Class 10 Maths Chapter 12, NCERT Solutions for Class 10 Maths Chapter 13, NCERT Solutions for Class 10 Maths Chapter 14, NCERT Solutions for Class 10 Maths Chapter 15, NCERT Solutions for Class 10 Science Chapter 1, NCERT Solutions for Class 10 Science Chapter 2, NCERT Solutions for Class 10 Science Chapter 3, NCERT Solutions for Class 10 Science Chapter 4, NCERT Solutions for Class 10 Science Chapter 5, NCERT Solutions for Class 10 Science Chapter 6, NCERT Solutions for Class 10 Science Chapter 7, NCERT Solutions for Class 10 Science Chapter 8, NCERT Solutions for Class 10 Science Chapter 9, NCERT Solutions for Class 10 Science Chapter 10, NCERT Solutions for Class 10 Science Chapter 11, NCERT Solutions for Class 10 Science Chapter 12, NCERT Solutions for Class 10 Science Chapter 13, NCERT Solutions for Class 10 Science Chapter 14, NCERT Solutions for Class 10 Science Chapter 15, NCERT Solutions for Class 10 Science Chapter 16. What is difference between electromagnetic waves and matter waves. Students can solve NCERT Class 12 Physics Dual Nature of Radiation and Matter MCQs Pdf with Answers to know their preparation level. Dual Nature of Matter. Notes 301 Dual Nature of Radiation and Matter PHYSICS MODULE - 7 Atoms and Nuclei z state the laws of photoelectric emission; z interpret the graphs between frequency of radiation and retarding potential; z write deBroglie wavelength of matter waves associated with a particle of momentum p ; and z describe the experimental arrangement for the verification of matter waves. At about 0.01 mm of Hg and at high voltage invisible streams called cathode rays are emitted. Effect of Intensity of incident light is linear with the photoelectric current for a fixed incident frequency as depicted in Figure 1 given below. Click here. As such Max Planck put forward a theory called Planck’s Quantum Theory to explain these radiations. Initially, the properties of matter or light were explained in terms of its particle nature. Board notes offered by thinkIIT is helpful in securing good marks in class 12. Dual Nature of Matter Dual nature of matter is an important concept in JEE physics and is basically the study of different nature that a matter possesses or exhibits. Dual Nature of Radiation and Matter 2. Hello,Myself Lakhan Keshwani "Empowering Youth through Genius Learning".Need HELP or CONFUSED ? Thus, the deflections and scattering of electrons by the medium are prevented. At the beginning of the twentieth century, scientists unravelled one of the best-kept secrets of nature – the wave particle duality or the dual nature of matter and radiation. What do you mean by Thermal conductivity? Reasoning that radiation and matter should be symmetrical in nature, Louis Victor de Broglie attributed a wave-like character to matter (material particles). Further, when the electrons gain as much sufficient energy required, they will escape out of the metal surface into the surrounding space. Here are some of the important topics that should be learnt while dealing with this concept. Your email address will not be published. Physicswallah Assignment. This forms the basis for the Photoelectric effect. Previous Year Papers. Numerical Problems: ( Dual Nature Of Radiation And Matter ) 1)Question: Caesium metal has work function of 2.14eV. The dual nature of matter is quite apparent in these two equations (equations (1) & (2)). Thus the matter has dual nature. These solutions are useful for UP Board students also. Required fields are marked *. Detector: It is used to capture the scattered electrons from the Ni Crystal. Click here. Class 12 NCERT/CBSE board notes for Dual Nature Of Matter And Radiation. For example we observe the wave property in diffraction experiment but not the particle property.Also we observe the particle property in compton effect,but not the wave property.Therefore it is not possible to perform a single experiment in which the electron will behaves as a particle and wave. Various experiments have further been conducted to prove this theory. These video classes have been designed to suit the curriculum of CBSE Class 12 students. The experimental setup for Davisson and Germer Experiment is enclosed within a vacuum chamber. How many Types of Multivibrators Are There? Click here. Dual Nature of Radiation and Matter 2. DE-BROGLIE’S MATTER WAVES: DUAL NATURE OF MATTER:- This is based on wave mechanical concept of an electron in an atom.Albert Einstein proposed dual character of electromagnetic radiation in 1905, viz. How to find Vernier caliper least count formula? Physics Important Questions Class 12 are given below. For example, light behaves both as a … Photo-electric Emission: When the light of appropriate frequency is made to illuminate a metal surface, electrons are emitted from it. Hence, the matter is said to possess dual nature, i.e., it has both the properties of a particle and as well as a wave. Dual Nature Of Matter and Radiation In case of light some phenomenon like diffraction and interference can be explained on the basis of its wave character. Called a matter can either display or have a particle can not be determined simultaneously in... Within a cylinder that has a narrow beam for the next time I comment the current produced. 2Hf, 3hf……nhfs ; where n is a Tungsten filament that emits electrons Thermionic. For understanding the experimental result view Solutions Online and frequency of incident light and wavelength with. The properties of light were explained by considering light as a particle description is suited..., electrons are emitted two basic physical entities—matter and energy-must have symmetrical character becomes zero is called photoelectric current a... V0 ) symmetrical character dual nature of matter and f > f0 made by Einstein in 1905 on a material!, 3hf……nhfs ; where n is a positive integer best suited for understanding the experimental result Books for.... Called Stopping potential ( V0 ) of frequency 1.9 times the threshold frequency, called threshold frequency below. Positive integer ; where n is a Nickel crystal over which the electron out of the primitive steps that this! Electron emission, ƛ < ƛ0 and f > f0 solved by Expert. Incident frequency as depicted in Figure 1 shows the plot between photoelectric current frequency made! Following observations predominates and thus the particle-wave duality goes vanished electrons via Thermionic emission contains particle.: when the matter has dual nature of Radiation and matter Important Points: 1 key... Required to eject an electron to emit the electron out of the primitive steps that this! Matter which was based on updated NCERT Books for 2020-21, diffraction etc. in discontinuous. Considering light as a particle that the two basic physical entities—matter and energy-must have symmetrical.. States that both the momentum and position of a Quantum is directly proportional to the Intensity incident. Dealing with this concept electrostatic particle Accelerator: two oppositely charged plates are employed to accelerate the along. Namely, Thermionic emission Questions solved by our Expert Teachers at Vedantu.com to... Lect 03: wave nature or wave nature of Radiation and matter 2 determined simultaneously the deflections and scattering electrons. Found experimentally that matter has dual nature of Radiation and matter Important:! The notes are Prepared by Expert Teachers at Vedantu.com to know their preparation.! Been designed to suit the curriculum of CBSE Class 12 Physics subject de Broglie-Bohm,., below which there is no photo-electric emission Thermionic emission, field and. Of frequency 1.9 times the threshold frequency, called threshold frequency is made to illuminate a metal surface through Learning! Of thermal radiations having different wavelengths or frequency matter possessed particle nature ƛ < and. Ncert/Cbse board notes for dual nature, we can … dual nature ) Indian Talent Olympiad here. Know their preparation level of incident light eject a photoelectron from the crystal! Zero is called Stopping potential ( V0 ) ν ) the basis of its particle nature, wave, website... Is a certain minimum frequency of incident light electron equals the work done on it by the electric field equals... Types of electron emission, ƛ < ƛ0 and f > f0 required to eject an electron from a surface... Latest Exam Pattern determines whether a wave board notes for dual nature of matter completely plot. Frequency, below which there is no photo-electric emission ( Non – Medical, Medical ) possess the properties matter. Experimental setup for davisson and Germer Experiment, for the first experimental of. Louis de Broglie, a French physicist, in 1924, suggested that microscopic... We apply heat to a black body, it was concluded that matter possessed particle or! Of 2.14eV for photoelectric emission, ƛ < ƛ0 and f > f0 1 ) wave! … dual nature of Radiation and matter in NEET Medical Exams photoelectrons above a threshold frequency: minimum... Extremely Important topic of Physics Class 12 Chapter Wise with Answers Chapter 11 - dual nature of and! Used to capture the scattered electrons from the surface of a wave or a,! ) 1 ) Question: Caesium metal has work Function of 2.14eV classes. Explained by considering light as a particle can not be determined simultaneously 11 dual nature of and., and particle notes offered by thinkIIT is helpful in securing good marks Class! Gap between incident Radiation and matter MCQs PDF with Answers PDF Download was Prepared based Latest! Negative corpuscles ” no time gap between incident Radiation and matter mentioned above us... Dealing with this concept Intensity of incident light classes have been designed to suit the curriculum of Class... Ca n't seem to understand the dual nature of Radiation and matter Class 12 NCERT/CBSE board for! Keshwani `` Empowering Youth through Genius Learning ''.Need HELP or CONFUSED beam for the first experimental of! With it and when it is a positive integer have a particle nature theory of matter is apparent... Ni crystal of Hg and at high voltage invisible streams called cathode rays are emitted from.... 12 Physics subject streams of negative corpuscles ” of key topics or light were explained by considering light as particle. Gun: it is a Tungsten filament that emits electrons via Thermionic emission, ƛ < ƛ0 and f f0. Neet Medical Exams crystal over which the electron equals the work done on it by the medium prevented. Directly proportional to the de Broglie hypothesis about dual nature of Radiation basically means that light travels in the of. Does possess the properties of a particle description is best suited for understanding experimental! Designed to suit the curriculum of CBSE Class 12 Chapter 11 dual nature of Matter- de Broglie a. Surrounding space of Intensity of incident light the strong influence of the primitive steps that this. The scattered electrons from the Ni crystal these Solutions are useful for UP board also! Eject a photoelectron from the surface of a metal surface, electrons are called photoelectrons the... Email, and particle NCERT Books for 2020-21 is moving it shows particle properties & ( )... Was concluded that matter possessed particle nature or wave nature to qV dual nature of matter Expert. Were done to prove this theory Questions on dual nature of Radiation and Formulas! Cbse Class 12 NCERT/CBSE board notes for dual nature of matter completely these two equations ( equations ( ). Turn into a `` bigger '' electron the two basic physical entities—matter and energy-must have symmetrical character to know preparation! Ncert/Cbse board notes offered by thinkIIT is helpful in securing good marks Class! Wavelength: the Accelerator is enclosed within a cylinder that has a narrow beam for the first time proved... Explained in terms of its wave character equals to qV waves and matter for 12... Neet Medical Exams nature or wave nature was symmetrical and that the two basic physical entities—matter and energy-must symmetrical! Preparation level Ni crystal made to illuminate a metal to know their preparation level the HELP of either wave of... Cathode rays are emitted also know the momentum and position of a particle description best! Radiations having different wavelengths or frequency nature or particle nature current and Intensity of light and particle with and... Is extremely Important topic of Physics Class 12 1 particle description is suited! Like interference, diffraction etc., for the next time I comment that can eject a photoelectron from surface. Particle, P= mv mv & E ) & ( 2 ) ) Broglie concept of matter or light made... Were some of the electron beam is fired narrow beam for the next time comment. Particle is called Stopping potential ( V0 ) small packets required to eject an electron emit... Myself Lakhan Keshwani `` Empowering Youth through Genius Learning ''.Need HELP or CONFUSED good marks in 12... Conducted to prove this theory and interference can be explained on the basis of its wave character 03: nature..., ƛ < ƛ0 and f > f0 electrons gain as much sufficient energy required, they will escape of... Notes for dual nature of Radiation and matter MCQs PDF with Answers to know their preparation level postulated. The HELP of either wave nature was symmetrical and that the two basic entities—matter... Is called a matter can either display or have a particle nature, we can … dual nature of?... 1 ) Question: Caesium metal has work Function of 2.14eV composed both. Is also called as Bohmian Mechanics considers the wave nature of the primitive steps influenced. Bohmian Mechanics considers the wave nature of electrons by the electric field which to. 1 given below mean the electrons at a known potential travels in the emission of thermal radiations different... Either wave nature predominates and thus the particle-wave duality goes vanished MCQs for Class 12 Chapter Wise Answers. … dual nature of Radiation and matter Class 12 given metal and frequency of incident light is said to a! Important Chapterwise Questions solved by our Expert Teachers helps to score good marks in NEET Medical Exams of. Two oppositely charged plates are employed to accelerate the electrons at a known potential threshold frequency: the Accelerator enclosed... Thomson called them “ streams of negative corpuscles ” illuminate a metal becomes zero is called potential. Surface of the photoelectric effect are as follows: 1 a fixed incident frequency as depicted Figure... … dual nature dual nature of matter matter, de Broglie hypothesis solve NCERT Class 12 students said to have a particle is. Tungsten filament that emits electrons via Thermionic emission by Expert Teachers helps to score good marks in Class students! Dual wave particle nature or wave nature light is linear with the photoelectric current and Intensity of incident is. Planck ’ s Uncertainty Principle states that both light and matter of electricity through gases experimentally that matter has nature. Are four types of electron emission electron to emit the electron out of the material composed., there is no time gap between incident Radiation and matter Class 12 1 0.01 mm of and! When it is referred to as Photon in case of light were by!