Light consists of very tiny, elastic, rigid particles known as corpuscular. Join the discussion forum to discuss your queries about nios board as well as cbse board. Free pdf download of ncert solutions for class 12 physics chapter 11 dual nature of radiation and matter solved by expert teachers as per ncert cbse textbook guidelines. Interference is described using real and complex numbers in anticipation of quantum mechanics. When solving numerical problems in the quantum theory of light it is useful to note that the product of. Physics numericals for class 11 complete solution with. Ncert solutions for class 12 physics chapter 11 dual. Visible light is usually defined as having wavelengths in the range of 400700 nanometers nm, or 4. The evidence for the description of light as waves was well established at the turn of the century when the photoelectric effect introduced firm evidence of a particle nature as well. In 1678, dutch physicist christian huygens proposed a theory to explain the wave nature of light. Often more than one wave must be added to the given incident wave to satisfy all boundary conditions. The physics of waves version date february 15, 2015.
Study material 12th physics wave theory of light 1. Refraction and reflection of plane waves using huygens principle. Even more important, though only touched on in this book, is the wave phenomenon of quantum mechanics, built into the fabric of our space and time. Besides the derivation and the theory, the numerical problems from various topics are asked in the exams. Youngs double slit experiment shows clearly that light is a wave. You also get idea about the type of questions and method to answer in your class 12th examination. He argued that the known properties of light, such as. Pdf a reflection on theories of light researchgate. We can say that light propagates as a wave and is emitted and absorbed as a particle. Physics notes for class 12 chapter 10 wave optics wave optics describes the connection between waves and rays of light. Ncert exemplar class 12 physics is very important resource for students preparing for xii board examination. Ncert solutions class 12 physics chapter 10 wave optics.
Other articles where wave theory of light is discussed. Free pdf download of ncert solutions for class 12 physics chapter 10 wave optics solved by expert teachers as per ncert cbse textbook guidelines. Light reflection and refraction jsunil tutorial cbse. For more information about professor shankars book based on the lectures from this course, fundamentals of physics. Definition of light before going into the wave theory of light, lets learn about light itself.
A ray of light travelling through air, falls on the surface of glass slab at an angle i. Psychology is the scientific study of the mind and behaviour, according to the american psychological association. Cbse class 12 physics chapter 10 wave optics notes in pdf are available for free download in mycbseguide mobile app. Wave theory definition of wave theory by merriamwebster. But we had learnt all waves have common characteristic properties such as. Sir isaac newton, held the theory that light was made up of tiny particles. Ncert solutions for class 12 physics chapter 10 wave. It is found that the angle betweeen the reflected and refracted ray is 90 0. Psychology is a multifaceted discipline and includes many subfields of study such areas as human development, sports, health. However, it was a breakthrough that led physicists to discover more about the world of physics and to understand our own world better, starting from the tiny particles of matter that are its.
Describe the dual nature of light, as a continuous wave and a discrete particle. A body which emits light in all directions is said to be the source of light. The wave theory and the particle theory of light were long considered to be at odds with. Many of these processes require calculus and quantum theory to describe them. Pdf insights into the foundations of quantum theory, including the waveparticle duality of light as developed in the last century, raise several. Here we have provided ncert exemplar problems solutions along with ncert exemplar problems class 12 question from very important topics are covered by ncert exemplar class 12. In order to observe the wave behavior of light, the slit size and separation should be comparable or smaller than the wavelength of light. The founder of physiological optics and father of the wave theory of light, he was also the first person to decipher a number of egyptian hieroglyphics. This is illustrated by the wave model of light and the particle model of light, which together describe the waveparticle duality in which light is understood to possess both wave and particle functions. All chapter 11 dual nature of radiation and matter exercises questions with solutions to help you to revise complete syllabus and boost your score more in examinations. Give a brief account of huygens wave theory of light. The rate of energy transfer by an electromagnetic wave is described by the poynting vector, s, defined as the rate at which energy passes through a unit surface area perpendicular to the direction of wave propagation wm2. Ncert solutions class 12 physics chapter 10 wave optics pdf comprises of mcqs, exemplary problems.
At the end of the nineteenth century, james clerk maxwell combined electricity, magnetism and light into one theory. All chapter 10 wave optics exercises questions with solutions to help you to revise complete syllabus and boost your score more in examinations. Quantum theory is simply a new way of looking at the world. Iit jee handwritten notes pdf for class 11 and class12 physics jee notes of alternating current. Newtons corpuscular theory, wave theory of light, physics. Wave theory of light by huygens, fresnel, young, etc in geometric optics we learnt light is a stream of straightgoing particles newton proposed that first then we learnt light is a form of em wave. In physics, a quantum is the minimum unit of any physical entity involved in an interaction.
Waveparticle duality publicized early in the debate about whether light was composed of particles or waves, a waveparticle dual nature soon was found to be characteristic of electrons as well. Wave theory of light class 12 hsc maharashtra board. Wave optics class 12 notes physics mycbseguide cbse. In 1678, dutch physicist, christiaan huygens, believed that light was made up of waves vibrating up and down perpendicular to the direction of the light travels, and ther. Each physics laws has a different set of equations which can only be understood if a student solves numericals which contain reallife applications of that topic. Physics numericals for class 11 practising numericals helps learners to enhance their knowledge about the subject and increases their speed of understanding and solving problems. Light or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that can be perceived by the human eye.
Simple derivation of electromagnetic waves from maxwells. Phys 201 lecture 18 wave theory of light open yale. The speed of light in a medium depends upon the nature of medium. Chapter maxwells equations and electromagnetic waves. Xii physics wave theory of light numericals youtube. According to maxwell, light was an electromagnetic wave.
This theory treats light as a particle called corpuscle. The problems are from chapter 2 the quantum theory of light of the course text modern physics by raymond a. Download ncert books 202021 for new session based on latest cbse syllabus. The rules as they apply to us dont apply to the tiny particles that quantum theory deals with. Light emerging out of a convex lens when a point source is placed at its focus. Photon quantum of energy outline light as waves light as particles.
Because light was an electromagnetic wave, light carried the same properties as the other electromagnetic waves. How can it make sense to use the same word wave for all these disparate phenomena. Topics covered include re ection and transmission at boundaries, dispersion, polarization e ects, di raction, coherence, ray optics and imaging, the propagation of light in matter, and the quantum nature of. Class 12 important questions for physics wave optics. Since the incident light is ppolarized the reflected wave will not. For this reason it is useful to characterize light radiation by. The best app for cbse students now provides wave optics class 12 notes latest chapter wise notes for quick preparation of cbse board exams and. These corpuscles on emission from the source of light travel in straight line with high velocity when these particles enter the eyes, they produce image of the object or sensation of vision. Inthe illustration the bottom wave has half the wavelength but twice the frequency of the one above it. Ncert solutions for class 12 physics chapter 10 in english medium free to download in pdf form for new session 20202021. The first theory of light was put forward by newton. According to wave theory of light, the light is a form of energy which travels through a medium in the form of transverse wave motion. Under these conditions, the picture of interest reduces to that depicted below. As we will see, the wave model could satisfactorily explain the phenomena of r eflection and r efraction.
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