Arial calibri times new roman stencil default design coreldraw 6. It tells the story of how the understanding of light and colour changed from newton in the 1600s to huygens and young by the turn of the 1900s as well as supporting alevel physics for many exam boards this lesson is also part of a chapter that covers the optional. Based on the wave theory, poisson, aragoand fresnel predicted that there should be a. Nov 21, 2016 wave theory of light, huygens principle. In a vacuum, or other uniform mediums, the light waves are spherical, and these wave surfaces advance or spread out as they travel at the speed of light. Light waves science quarter 1 essential questions how does light travel. This property forms the basis of the fields of optics and optical communications and a myriad of related technologies, both mature and emerging. In a vacuum, or other uniform mediums, the light waves are spherical, and these wave surfaces. Huygens deduced the laws of reflection and refraction and could explain double refraction to prove the theory of wave. Study material 12th physics wave theory of light 1. Five waves move in the direction of the main trend, followed by three waves in a correction totaling a 53. The toolkit is supported by lessons 1 and 3 of the light and color chapter at the physics.
Mar 20, 2020 the elliott wave theory is interpreted as follows. May 26, 2014 study material 12th physics wave theory of light 1. Phys 201 lecture 18 wave theory of light open yale. How does light react to different objects and substances. These are the slides i created for physics 1425 physics i for engineers in the spring of 2010. If the relative amplitude of oscillation at different points in the field remains constant, the wave is said to be a standing wave. Einstein, 1954 in fact it is possible for a finite spherical universe to form within an infinite space. The theory was spread most significantly by robert hooke and christiaan huygens in the 17th century. The wave theory and the particle theory of light were long considered to be at odds with. The amplitude of a light wave is related to its intensity.
Definition of light before going into the wave theory of light, lets learn about light itself. Here, in the article we discuss various theories on. This chapter is essentially an introduction to the wave theory of light. Fundamentals of physics, ii phys 201 youngs double slit experiment shows clearly that light is a wave. They were supplemented with some clicker questions supplied with the textbook giancoli, but most of the slides used are here in pdf format.
It tells the story of how the understanding of light and colour changed from newton in the 1600s to huygens and. Can we visualize a 3d universe which is finite yet unbounded. The text is designed for upperlevel undergraduate students with a physics background. The corpuscular theory was largely developed by isaac newton.
The wave particle duality principle of quantum physics holds that matter and light exhibit the behaviors of both waves and particles, depending upon the circumstances of the experiment. The energy however is passed along the water from one wave to the other. Youngs double slit experiment shows clearly that light is a wave. The theory of quantum physics was derived in the early 1900s, partly to explain the odd behaviour seen in the so called photoelectric effect. It is a site where you can learn all the concepts of advanced science too. The wave theory of light the wave theory of light was the way we first understood light. 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 light. At that level a quantum theory is needed to explain the characteristics of light and to explain the interactions of light with atoms and molecules. Quantum physics the wave structure of matter wsm and spherical standing wave interactions explains discrete energy states of quantum theory wave mechanics. Properties of light university of maryland college of. Definition of light before going into the wave theory of light, lets learn about light. Online query solving online mcq tests with detailedsolutions online notes and solvedexercises career counseling 2.
Light is composed of particles called photons, and matter is composed of particles called electrons, protons, neutrons. Wave theory of light definition of wave theory of light by. Eventually the modern theory of quantum mechanics came to picture light as in some sense both a particle and a wave, and in another sense, as a phenomenon which is neither a particle nor a wave which actually are macroscopic phenomena, such as baseballs or ocean waves. Light waves can interfere with other light waves, canceling or amplifying them. The nature of light as a wave a small disturbance in an electric field creates a small magnetic field, which in turn creates a small electric field, and so on light propagates itself by its bootstraps.
The diagram above gives a side view of transverse water wave. Visible light is usually defined as having wavelengths in the range of 400700 nanometers nm, or 4. Interference is described using real and complex numbers in anticipation of quantum mechanics. Here, in the article, let us discuss the wave theory of light in detail. Phys 201 lecture 18 wave theory of light open yale courses. Oct, 2017 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. It was observed that when light fell on a metal surface, electrons could be emitted by the metal. A century later it was postulated that light could be a transverse wave. Light or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that can be perceived by the human eye. This is a lesson and powerpoint that covers both newtons corpuscular theory of light and huygens wave theory of light. Light travels as transverse waves and faster than sound.
Quantum theory tells us that both light and matter consists of tiny particles which have wavelike properties associated with them. The frequency of a light wave is related to its color. As we will see, the wave model could satisfactorily explain the phenomena of r eflection and r efraction. Huygens theory was the successful theory of light wave motion in three dimensions. Quantum physics powerpoint ppt presentations powershow. Conceptual ideas develop logically and sequentially, ultimately leading into the mathematics of the topics. How light travels light waves ks3 physics revision bbc. The wave model of light toolkit provides teachers with standardsbased resources for designing lesson plans and units that pertain to such topics as the light s wavelike behaviors, wave particle duality, light wave interference, and light polarization. How light travels light waves ks3 physics revision. If the relative amplitude at different points in the. Other articles where wave theory of light is discussed. The distance between two successive crests or two successive troughs is the wavelength for a transverse wave. Wave theory of light history, huygens propostions and more. The wave model of light toolkit provides teachers with standardsbased resources for designing lesson plans and units that pertain to such topics as the lights wavelike behaviors, waveparticle duality, lightwave interference, and light polarization.
All presentations are compiled by our tutors and institutes. Each lesson includes informative graphics, occasional animations and videos, and check your understanding sections that allow the user to practice what is taught. Xii physics wave theory of light linkedin slideshare. Studymaterial for the wave theory of light, maharashtra class 12science physics, physics. Now a purely particle theory contains nothing that enables us to define a frequency. Ks3 year 8 physics light powerpoints teaching resources. In 1801 english physicist thomas young performed this experiment to determine if light was a particle or a wave. Hsc physics wave theory of light light luminiferous. State and apply the relation among wavelength, frequency and speed of a. Light waves travel at c in full agreement with maxwells famous equations of electromagnetism. Intensity is the absolute measure of a light wave s power density. The exact nature of visible light is a mystery that has puzzled man for centuries. Powerpoint slide on electromagnetic wave theory compiled by nikita thalia.
In physics, mathematics, and related fields, a wave is a disturbance change from equilibrium of one or more fields such that the field values oscillate repeatedly about a stable equilibrium resting value. In the face of this compelling evidence, nineteenthcentury scientists had to concede that light was a wave. Perform experiments to demonstrate how light waves react. Properties of light waves, particles and em spectrum interaction with matter absorption re. Color is such a complex topic that it has its own section in this book. So light, and all other electromagnetic radiation, is now recognised as something rather strange. In order to observe the wave behavior of light, the slit size and separation should be comparable or smaller than the wavelength of light.
Mhhscphywave theory of lightpart 1 powerpoint slides. The wave theory of light answers one of the most crucial question in physics the fundamental nature of light. This ppt contains powerpoint presentation for wave theory of light part 1. At this stage you should get a basic understanding of the wave model of light, which involves the idea of light as a complex superposition of many component waves, or elementary waves, each with its own wavelength. Light consists of very tiny, elastic, rigid particles known as corpuscular. Huygen, suggested that light wave peaks form surfaces like the layers of an onion. Since it travels at the speed of light, c 3 108 m s.
Greek scientists from the ancient pythagorean discipline postulated that every visible object emits a steady stream of particles, while aristotle concluded that light travels in a manner similar to waves. The wave structure of matter wsm explains huygens principle. 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. Newtons theory was predominant for more than 100 years and took precedence over huygens wave theory of light, partly because of newtons great prestige. Comprehensive collection of powerpoint presentations ppt for physics.
You may be aware by now that light is a form of energy. Key vocabulary light waves electromagnetic spectrum angle of reflection angle of incidence reflect reflection refract refraction absorb absorption light waves assignment you will work in a group to. Visible light waves visible light waves are the only electromagnetic waves we can see. Powerpoint presentations ppt collection for physics. Newton rejected the wave theory for good reason, but assumed the waves would be longitudinal like sound. Huygens proposed a wave theory of light while newtons was a corpuscular particle theory of light.
In the 1600s, christiaan huygens and isaac newton proposed competing theories for lights behavior. Its only when the mass of a particle gets small enough that its wavelike properties show up. Diffuse reflection using mirrors colour the colours of the rainbow. Transverse waves consist of high parts or peaks called crests and low parts called troughs. This happened slowly, though, hampered by newtons reputation and the legacy of his corpuscular theory. Here, in the article we discuss various theories on the nature of light proposed by great thinkers and scientists.
Describe the basic features of the wave model of light. Einstein, 1954 in fact it is possible for a finite spherical universe to form within an. 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. It is a complex topic but among the most intriguing in physics. S3p211 summarize the evidence for the wave model of light. Brightness is the relative intensity as perceived by the average human eye. Ray diagrams show what happens to light in mirrors and lenses. Alevel turning points in physics newton and huygens.
Hsc physics wave theory of light free download as powerpoint presentation. 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. On the one hand the quantum theory of light cannot be considered satisfactory since it defines the energy of a light particle photon by the equation ehf containing the frequency f. Five waves move in the direction of the main trend, followed by three waves in a correction totaling a 53 move. Wave theory of light definition of wave theory of light. The physics classroom tutorial presents physics concepts and principles in an easytounderstand language. After this a physics scientist huygens comes and he presented that the light are in the form of wave. For each approved ppt you will get 25 credit points and 25 activity score which will increase your profile. The wave theory of light proposed by christian huygens has stood the test of time and today, it is considered the backbones of optics. Red has the longest wavelength and violet has the shortest wavelength. Quantum laser pointers brings you the infamous double slit experiment right in the palm of your hand. When the corpuscular theory failed to adequately explain the diffraction, interference and polarization of light it was abandoned in favour of huygens wave theory. Quickly assess your understanding of what light is, and the history of those who worked on the wave theory of light, using this multiple choice quiz and worksheet. Christiaan huygens, thomas young, augustin jean fresnel, franaois arago created date.