Definition of light before going into the wave theory of light, lets learn about light itself. Cbse class 12 physics chapter 10 wave optics notes in pdf are available for free download in mycbseguide mobile app. All chapter 10 wave optics exercises questions with solutions to help you to revise complete syllabus and boost your score more in examinations. Because light was an electromagnetic wave, light carried the same properties as the other electromagnetic waves. Wave theory definition of wave theory by merriamwebster. For this reason it is useful to characterize light radiation by. How can it make sense to use the same word wave for all these disparate phenomena. But we had learnt all waves have common characteristic properties such as. 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. 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. The rules as they apply to us dont apply to the tiny particles that quantum theory deals with. 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. As we will see, the wave model could satisfactorily explain the phenomena of r eflection and r efraction. Under these conditions, the picture of interest reduces to that depicted below.
Newtons corpuscular theory, wave theory of light, physics. Wave optics class 12 notes physics mycbseguide cbse. Free pdf download of ncert solutions for class 12 physics chapter 10 wave optics solved by expert teachers as per ncert cbse textbook guidelines. Describe the dual nature of light, as a continuous wave and a discrete particle. Besides the derivation and the theory, the numerical problems from various topics are asked in the exams. We can say that light propagates as a wave and is emitted and absorbed as a particle. Refraction and reflection of plane waves using huygens principle. Youngs double slit experiment shows clearly that light is a wave.
Simple derivation of electromagnetic waves from maxwells. 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. Psychology is the scientific study of the mind and behaviour, according to the american psychological association. Ncert solutions class 12 physics chapter 10 wave optics pdf comprises of mcqs, exemplary problems. Interference is described using real and complex numbers in anticipation of quantum mechanics. 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.
When solving numerical problems in the quantum theory of light it is useful to note that the product of. 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. Join the discussion forum to discuss your queries about nios board as well as cbse board. This theory treats light as a particle called corpuscle. For more information about professor shankars book based on the lectures from this course, fundamentals of physics. Photon quantum of energy outline light as waves light as particles. Wave theory of light class 12 hsc maharashtra board.
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. Download ncert books 202021 for new session based on latest cbse syllabus. A body which emits light in all directions is said to be the source of light. The wave theory of light, proposed by dutch physicist christian huygens in 1678, has stood the test of time and is today considered one of the backbones of optics. Many of these processes require calculus and quantum theory to describe them. 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. 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. Pdf insights into the foundations of quantum theory, including the waveparticle duality of light as developed in the last century, raise several.
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. Light reflection and refraction jsunil tutorial cbse. Ncert solutions class 12 physics chapter 10 wave optics. The first theory of light was put forward by newton. Light or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that can be perceived by the human eye.
Light emerging out of a convex lens when a point source is placed at its focus. Pdf a reflection on theories of light researchgate. The physics of waves version date february 15, 2015. Give a brief account of huygens wave theory of light. Ncert solutions for class 12 physics chapter 11 dual. Physics notes for class 12 chapter 10 wave optics wave optics describes the connection between waves and rays of light. The problems are from chapter 2 the quantum theory of light of the course text modern physics by raymond a. Xii physics wave theory of light numericals youtube.
A ray of light travelling through air, falls on the surface of glass slab at an angle i. The wave theory and the particle theory of light were long considered to be at odds with. Huygens put forward his wave theory according to which light energy propagated in the form of wave, with the help of wave theory he could successfully explain the phenomenon of reflection and refraction, interference and diffraction all. Ncert exemplar class 12 physics is very important resource for students preparing for xii board examination. He argued that the known properties of light, such as. In 1678, dutch physicist christian huygens proposed a theory to explain the wave nature of light. Inthe illustration the bottom wave has half the wavelength but twice the frequency of the one above it. Since the incident light is ppolarized the reflected wave will not. 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. Class 12 important questions for physics wave optics. Chapter maxwells equations and electromagnetic waves. It is found that the angle betweeen the reflected and refracted ray is 90 0.
Ncert solutions for class 12 physics chapter 10 wave optics. Visible light is usually defined as having wavelengths in the range of 400700 nanometers nm, or 4. Ncert solutions for class 12 physics chapter 10 in english medium free to download in pdf form for new session 20202021. At the end of the nineteenth century, james clerk maxwell combined electricity, magnetism and light into one theory. Iit jee handwritten notes pdf for class 11 and class12 physics jee notes of alternating current. 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. This confusion about the true nature of light continued for some years till a modern quantum theory of light emerged in which light is neither a wave nor a particle the new theory reconciles. Light consists of very tiny, elastic, rigid particles known as corpuscular. 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. In physics, a quantum is the minimum unit of any physical entity involved in an interaction. S3p211 summarize the evidence for the wave model of light. You also get idea about the type of questions and method to answer in your class 12th examination. The speed of light in a medium depends upon the nature of medium.
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. Physics numericals for class 11 complete solution with. Phys 201 lecture 18 wave theory of light open yale. Often more than one wave must be added to the given incident wave to satisfy all boundary conditions. Ncert solutions for class 12 physics chapter 10 wave. According to maxwell, light was an electromagnetic wave. 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. Study material 12th physics wave theory of light 1. 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. In order to observe the wave behavior of light, the slit size and separation should be comparable or smaller than the wavelength of light. 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. Quantum theory is simply a new way of looking at the world. Sir isaac newton, held the theory that light was made up of tiny particles. Other articles where wave theory of light is discussed.167 563 1184 1509 88 1391 351 712 1229 458 1302 1237 408 1072 950 1268 1410 776 676 790 1150 1307 330 1415 913 920 1405 1430 1161 50 1167 106 231 1056 133 1481 843 377 682 1142