Properties of multiplication and division and solving problems with units of 25 and 10 this 25day module begins the year by building on students fluency with. View notes module 3 notes from module 3 at university of florida. If we were to consider light waves as rays, diffraction. The nature of light summary the physics hypertextbook. For photovoltaic applications, this level of detail is seldom required and therefore only a few sentences on the quantum nature of light are given here. In this module, you will begin working on the topic of earth and space science. Module 3 the nature and properties of light lens optics. Oct 10, 2018 lightemitting diodes leds, which convert electricity to light, are widely used in modern societyfor example, in lighting, flatpanel displays, medical devices and many other situations. The timesymmetric nature of these interactions make them e ectively instantaneous. Module 3 notes module 3 properties and nature of light. In addition, you should be able to use algebra, plane geometry, and trigonometry especially the use and. For collecting sunlight, static light concentrator having a prism like structure is. Module 3 the nature and properties of light free download as pdf file. To work in photonics it is necessary to have a basic understanding of the nature of light and its properties.
When light travels from air to water, its speed decreases. Figure onedimensional representation of the electromagnetic wave. To the eye, the ray seems to come from behind the mirror. Any study of the nature of light must explain the following observed properties. The word wavelength is used to express the wave or undulating property of light. In this activity, students will explore the magnifying properties of the lenses and. Most of the chemical and optical properties of a substance are. Manufacturing properties of engineering materials lecture notes prof. You will begin by looking into the features of the earth and how those features are changed over time by erosion, weathering and deposition, as well as looking into what makes up these earth materials. Module 3 properties and nature of light light is the cosmic messenger that carries messages over the vast expanse of the. Many metals have high strength and high elastic module.
This complementary nature of light is now well accepted. The natural light illumination system can be divided into collecting, transmission and lighting components 11. Properties which are responsible for transmission of mechanical waves in a medium are elasticity. Module 3 the nature and properties of light slideshare. Potters group is centered on the synthesis and study of glass, ceramic, and molecular hybrid. Based on a demand by end customers for higher bandwidth, fiber penetration in the loop plant starts becoming noticeable as well. Optical properties glasses are among the few solids that transmit visible light thin film oxides might, but scattering from grains limit their thickness mica windows at acoma pueblo glasses form the basic elements of virtually all optical systems. Science az light energy grades 56 physical science unit. It is referred to as the particlewave duality, and is summarised by the equation e hf hc 1. Diffraction diffraction is the resultant of the wave nature of light. When we see light, what we observe by eye or on film is the average energy per unit area per time arriving. Each point of an illuminated object emits a continuum of light rays in a. Module 8 from the universe to the atom 53 lessons video lessons by expert teachers that cover the nsw year 12 physics syllabus comprehensively. They maintain their good strength at high and low temperatures.
Nature of light light has both wave and particle properties particlelike. It also discusses laser safety in detail, including the human eye, laser hazards, laser safety controls, maximum permissible exposure, laser safety glasses, and laser accidents. The speed of all electromagnetic waves in vacuum are the same, and is equal to. Optical instruments ease module 4 integrated science 1 laboratory safety precautions beam iv unit 2. Light may be defined as electromagnetic radiation that. Potter professor, material science and engineering dept, university of arizona. Ease module 3 the nature and properties of light deped. If the wall opening in the ulbricht sphere, see figure 3. Figure 18 comparing coherent and incoherent light a coherent light. Like all electromagnetic waves, light can travel through a vacuum. Light is a transverse, electromagnetic wave that can be seen by the typical human.
When light waves pass through an aperture or across a sharp edge, the light waves spread out. What happens to an electromagnetic wave when it interacts with a particle. Light allows us to see and gives us information about the universe as a whole. Light functions due to three fundamental properties.
Module 4 optical instruments what this module is about in the previous modules, you learned about the properties of light. You also learned how images are formed by mirrors and lenses. Light waves can interfere with other light waves, canceling or amplifying them. The catalyst was pretreated in 20 standard cubic centimeters.
Every element of matter is coupled to all other matter on its light cone by timesymmetric interactions. A complete description of the nature of light requires two explanations. Chapter 33 the nature and propagation of light by c. Most of the energy lost is in the infrared band which has a heating effect, not a lighting effect. The videos fully explain complex physics questions through animations, firsthand investigations filmed at macquarie university science labs, and tutorials. Module 6 sample lesson plans in science 2 understand what they are learning in the lesson. Light also helps you identify objects both near and far. Perhapsthemostnatural test of amaterials mechanical properties is the tensiontest,in which astriporcylinderofthematerial,havinglengthlandcrosssectionalareaa,isanchoredatone end and subjected to an axial load p a load acting along the specimens long axis at the. Wavelength is the distance between peaks on a light wave, as represented in figure 21. Lesson 1 lesson 2 lesson 3 lesson 4 the nature of light reflection and mirrors refraction and lenses colors, interference and polarization. Now it is also known that the shorter the wavelength is, the more energy is carried by the beam. This module discusses the nature and properties of light. By using the actual content of the sample lessons, it helps pupils to understand science content better.
The stars and planets that make up andromeda might seem to be the. The amplitude of a light wave is related to its intensity. This part can help them consider and improve upon the way they plan the use of the chalkboard. Light and illumination a powerpoint presentation by paul e. Much diverse and fundamental knowledge on the nature of. Aug 25, 20 module 3 the nature and properties of light 1. 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. However, even an ordinary torch beam is a torrent of 1017 photons. A rainstorm among open patches of daylight can cast. This unit helps students explore the nature of light, the movement of light, natural and manmade sources of light, and the special behaviors and properties of light. Tutorial covers the properties of diffraction and interference.
A complete physical description of the properties of light requires a quantummechanical analysis of light, since light is a type of quantummechanical particle called a photon. Since light can be analysed as a complex mixture of a huge number of individual. When light travels from an optically less dense to denser medium at an angle, say from air to glass, light bends toward the normal figure 3. Alan doolittle most of the figures and text are from the online text for this class, pvcdrom original references are given therein. Light properties of light university of washington. Why do some objects appear transparent or opaque, clear or colored. The basic nature of light nature of light photon terrace. Designed for use as a textbook of general physics 4 treatise on practical light nature volume 88. Now within the visible light spectrum and ill talk about whats beyond the visible light spectrum in a second youre probably familiar with the colors.
Module 3 the nature and properties of light what this module is about most of the things that you know you have learned about through your eyes. Light can also tell us the relative densities of mediums. The section gives examples of english that can be used in particular activities. Intensity is the absolute measure of a light waves power density. This module discusses the realm of physics to define what physics is, some. How can it be used to identify elements and chemical composition. Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use.
They will examine how white light can be made up of colours. Since these waves consist of oscillating electric and magnetic fields which can exist in empty space, light can travel through a vacuum. It is the distance that light travels in one oscillation, and is often expressed using a unit called nanometer. Light spectrum the appearance of light depends on its power spectrum how much power or energy at each wavelength daylight tungsten bulb our visual system converts a light spectrum into color this is a rather complex transformation the human visual system color perception light hits the retina, which contains photosensitive cells. The transverse nature of light can be demonstrated through polarization. The nature of light reading assignment chapter 2 of pvcdrom dr. Learning pack for light and optical systems unit 3 science focus 8 3 student instructions for use of this learning pack the purpose of this learning unit pack is to provide you with the resources that will help you cover the material from the curriculum that will be tested on the final exam in june. This module addresses various nonlaser light sources, such as incandescent lamps, fluorescent discharge lamps, highintensity discharge lamps, flashlamps, arc lamps, and leds. Each of the five waves has the same phase angle along the vertical line yy, and all have the same wavelength. The section suggests effective use of english language in the science lessons. Module 3 the nature and properties of light what this module is about most of the things that you know you have learned about through your. As discussed in module 11, nature and properties of light, light can be understood as consisting of waves traveling through space. Changes in matter physical and chemical changes phase changes of matter 4.
Vandergriff director of photonics system engineering science applications international corporation mclean, virginia light plays a vital role in our daily lives. In bulbs, electric potential is converted to light. Now it is time to apply these ideas to some common optical lenses and to show how such devices work. They will look at the differences between humanmade and natural light and how humanmade light was designed to solve problems in the home and at school. It is used in compact disc cd players, in which a laser reflecting off a cd transforms the returning signal into music. A convex lens can cause parallel rays of light to converge. Maybe you imagine them as the colors of the rainbow. But it is not necessary to go into detail about that complexity if all you want to do is understand the underlying principles of wave motion and behaviour.
Refraction of different colors when light waves from the sun pass through a droplet of water in a cloud or. And rainbows really happen because the light from the sun, the white light, is being refracted by these little water particles. Even water waves on the surface of the sea can be very intricate. What are the common properties and characteristics of light. Light occurs in different wavelengths, just as waves on the ocean vary in length. Students will also study the characteristics and properties of light. Module 3 the nature and properties of light lens optics light. It delves into the concepts of reflection, refraction, colors, interference, and polarization. Photonics technicians and engineers must master new concepts, learn new techniques, and develop new skills. Introduction a coating of oil on water or a delicate glass prism can create a rainbow. Light may be defined as electromagnetic radiation that is capable of affecting the sense of sight.
Chapter 33 nature and propagation of light from vision to digital camera to rainbows to pictures of the early universe light is all around us. Glencoe physical science vii organize each wave characteristic in the venn diagram to show whether it is a trait of tides, waves created by wind, or both. Optical instruments ease module 2 laboratory apparatus, safety rules and symbols ease module 3 the nature and properties of light probe how many drops. It also explores how colors are formed and how the human eye enables us to see. Before you begin your study of this module, you should have completed a study of module 11, nature and properties of light, and module 1 3, basic geometrical optics. A medium is optically dense if it slows down the speed of light. Hu light is a transverse wave of the electromagnetic field. Put simply, it is all about the dispersal of a short light wave into free electrons and a longer wave. Potter is a professorof material science and engineering in the university of arizona. In this module you will learn about the nature and properties of light in the following lessons. The simplest demonstration of the wave nature of light is to throw two stones into a pool of water and watch the waves from each pass through each other and emerge unchanged. Using centers to investigate special properties of light.
Because none of the rays actually emanate from the image, it is called a virtual image. Speed of light depends on media medium speed ms refractive index vacuum 3 x 108 air 2. Light that is created by people, and does not occur naturally is artificial light. For photovoltaic applications, this level of detail is seldom required and therefore only a few sentences on the quantum nature of light. Mar 24, 2017 it is a great challenge to substantially improve the practical performance of flexible thermoelectric modules due to the absence of airstable ntype thermoelectric materials with highpower factor. Teachers need to consider ho w to use and organise the chalkboa rd. The wave nature of light was first illustrated through experiments on diffraction and interference.
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