NCERT Solutions for Class 12 Physics Chapter 11 - Dual Nature of Radiation and Matter
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FAQs on NCERT Solutions for Class 12 Physics Chapter 11 Dual Nature and Radiation of Matter: Free PDF Download
1. How Many Subtopics are There in the Dual Nature of Radiation and Matter Chapter of class 12 Physics?
The 11th chapter of class 12 Physics book is the dual nature of radiation and matter which deals with a vast range of subtopics. The chapters are divided as:
Electrons and emission
Photoelectric effect
Hertz's observation
Hallwachs’ and Lenard's observation
Tentative study of the photoelectric effect
The effect of intensity on photocurrent
The result of potential on photoelectric current
The frequency of incident radiation on stopping potential and its effect
Wave theory light and Photoelectric effect
Energy quantum radiation and Einstein's photoelectric equation
Photon: particle nature of light
Matter’s wave nature
Davisson and Germer's experiment
2. What is the Nature of Radiation?
Radiation is a form of energy. There are two kinds of radiation that is particulate radiation and electromagnetic radiation. The particulate radiation involves tiny fast-moving particles that have both energy and mass. It is principally formed by the disintegration of an unstable atom with Alpha and Beta particles.
The Alpha particles can travel only a short distance and are stopped by an object. At the same time, Beta particles are half the size of alpha particles but are fast-moving electrons.
The electromagnetic radiation is pure energy with no mass and is like vibrating or energetic waves of magnetic and electrical energy. This vibrating charge produces electromagnetic waves, which consists of both electric and magnetic components.
3. What were the Observations Made by Hertz and Lenard’s on the Photoelectric Effect?
There were primarily three observations made be Hertz and Lenard; there are as follow:
The intensity of light falling on an electrode is directly proportional to the photoelectric current. The stopping potential often stays independent of the intensity of the light.
The maximum kinetic energy increases along with the increase in the frequency of light. Stopping potential becomes less as the frequency of light increases, implying that the kinetic energy of the electrons increases.
The light above a certain frequency can create a photoelectric current. This is commonly referred to as the threshold frequency and varies with the electrode material in use.
4. Why is Vedantu NCERT Solutions Class 12 Physics Chapter 11 really helpful?
Vedantu’s NCERT Solutions Class 12 Physics Chapter 11 are really important to every student preparing for the final board exam. Apart from the board exam, these solutions come handy when it comes to the various entrance or competitive exams preparation. These solutions are extremely well designed by the in house Physics experts accurately and comprehensively.
NCERT Solutions Class 12 Physics helps to prepare for the exams without any hassle as it consists of important questions-answers, diagrams, graphs, illustrations and examples that are relevant to the chapter. With the help of this solution, students can understand a chapter in an interactive and efficient way.
5. What is the Chapter 11-”Dual nature of matter and radiation” of Class 12 Physics about?
The dual nature of matter and radiation in Class 12 explains the duality in the nature of matter, namely particle and wave. In this chapter, it is explained that according to the de Broglie concept of matter waves, when the matter is at rest, it acts like a particle and when the matter is moving, it acts like a wave and shows its properties. Therefore it is said that matter has the dual nature of both a particle and a wave.
6. Who gave the concept of the dual nature of radiation?
Louis De Broglie gave the concept of the dual nature of radiation. Radiation is a form of energy. The process of giving off energy in the form of waves or particles suggests the dual nature of both a particle and a wave. If you are facing any difficulty in any topic, you can take a look at Vedantu’s NCERT Solutions Class 12 Physics Chapter 11 which are prepared by experts and are presented in a very clear and precise manner so that you can understand the concepts well. These NCERT Solutions are also available in the form of PDF which can be downloaded free of cost.
7. What is meant by the dual nature of matter?
The dual nature of matter and radiation class 12 explains the duality in the nature of matter, namely particle and wave. According to the de Broglie concept of matter waves, when the matter is at rest, it acts like a particle and when the matter is moving, it acts like a wave and shows its properties. Therefore it is said that matter has the dual nature of both a particle and a wave.
8. What concepts can I learn using the NCERT Solutions for class 12 Physics Chapter 11?
The CBSE board question papers have 99% of questions from NCERT only. Sometimes, CBSE asks twisted questions but with the same concept given in NCERT. The trick to scoring well in class 12 Physics Chapter 11 is to clear your concepts instead of mugging them up. In order to score maximum, one should practice a lot. NCERT books offer multiple kinds of questions at the end of each chapter. Vedantu offers solutions for this chapter. You can access these solutions on the vedantu website or the vedantu app. These solutions are prepared by experts and are written in easy to understand language.
9. Why is Class 12 Physics Chapter 11 important?
Aside from these dual nature of matter and radiation class 12 questions, students must also complete extra activities that contain mathematical and theoretical issues. They should look over the whole chapter and make sure they grasp everything there is to know about it. It will help them uplift their analytical and practical skills.