Read it now enter your mobile number or email address below and well send you a link to download. Glass,water,clear plastic and air are transparent materials. Choose file properties, click the description tab, and then click additional metadata. Its dual behavior is partly explained by 1doubleslit experiment of thomas young who represents the photons motion as a wave and also by 2the photoelectric effect in which the photon is considered as a particle. Lesson 2, light properties worksheet 1 light properties worksheet 1. Properties of light and electricity 45 the student will demonstrate. In a vacuum, light will travel in a straight line at fixed speed, carrying energy from one place to another. Light can also be described in terms of a stream of photons, massless packets of energy, each travelling with wavelike properties at the speed of light. Properties of light and examination of isotropic substances. In the properties of light bending light lab you will explore how light rays interact as they pass from one material, or medium, to another. Toaverygoodapproximation, lighttravelsinstraightlines, and behavesmuchlikeaparticle. The basic properties of light are its wavelength, frequency, energy and speed. Lightweight concrete this chapter covers some of the physical properties of lightweight concrete.
Light or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that can be perceived by the human eye. 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. Understanding light characteristics, natural or artificial, will help elevate you to the next level of photography. Black is the absence of color, white is the blending of all colors. For example,if you move a pencil slowly up and down in a bowl of water, the waves produced by the pencils motion will be small and spread apart. Medium is the substance through which light travels. Reflection incident ray reflected ray normal surface 4. Wavelengths are measured in nanometers nm and different wavelengths of light represent differing colors. Reflection reflection when a wave strikes an object and bounces off 3. Most water lets at least some light through it, but this light is bent. Other types of electromagnetic radiation include gamma rays, xrays, ultraviolet light, infrared light, microwaves, and radio waves. The monochromaticity is the major characteristic of laser making it different from ordinary light. Properties of light waves, particles and em spectrum interaction with matter absorption re.
Light is a form of energy which is given by luminous objects. Physical properties of light light consists of photons particles with no mass which travelatthespeedoflight. 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. This time, only white light emerged, as shown in figure 4. Pdf the purpose of this study is to propose a way for teaching models of light to upper. The wavelength and frequency of light determine where the light is located along the electromagnetic spectrum. This short video explains one of the most important. Ex an orange is orange because it absorbs every color but orange, instead it reflects orange. Mhr 147 producing the visible spectrum at one time, people believed that colour was something added to light. The light waves interfere when they have the same frequency, amplitude and phase producing regions of constructive interference and regions of destructive interference, they diffract in the same medium when they pass through a slit or by a sharp edge having dimensions near to the wavelength of the light waves light interference.
You will receive a zip file which contains a video response worksheet in both pdf and editable docx formats and a video response worksheet key in both pdf. 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. Life in the aquarium can only exist with light but light is a complex physical phenomenon. Complete vocabulary miniunit for properties of light 5. This short video explains one of the most important thing around us. Seawater physical properties light, viscosity, and pressure another important characteristic of water is how it transmits light. Unlike the countryside, where there are many factors which influence the way in which light radiates, the lighting in. One of the many remarkable properties of light is its universal, constant speed. Oct 16, 2017 the light waves interfere when they have the same frequency, amplitude and phase producing regions of constructive interference and regions of destructive interference, they diffract in the same medium when they pass through a slit or by a sharp edge having dimensions near to the wavelength of the light waves. When moving from place to place, light acts like a system. Thus laser light is monochromatic light means that laser light is only a single color light. The electromagnetic spectrum can be divided into several bands based on the. The properties of light are intensity or brightness, direction, frequency or color and polarization.
Reflection incident ray reflected ray normal surface 6. Properties of light and reflection 1 properties of light and reflection 2 reflection. Light travels in s straight line as long as it is moving through a medium. Light and its nature have caused a lot of ink to flow during these last decades. Light readings andrew glassner, principles of digital image synthesis vol. Properties of waves the properties that waves have depend on the vibrations that produce the waves. Aug 19, 2011 light and its nature have caused a lot of ink to flow during these last decades. Seawater physical properties light, viscosity, and pressure. Since greek times, scientists have debated the nature of light. For example, a blue object reflects blue light and absorbs all others. Properties of light and examination of isotropic substances this document last updated on 17oct2014 the optical properties of crystals are, next to xray diffraction and direct chemical analyses, the most reliable properties available to distinguish and identify minerals. Two key properties of light interacting with a medium are. In the figure such two rays emerging from object and passing through the hole and form image of the object,the image formed by this device is inverted. To start an investigation in the science journal app, click on the menu three parallel lines at the.
Describe the six properties of electromagnetic waves and give everyday examples. Technological applications based on the manipulations of light include lasers, holography, and fibreoptic telecommunications systems in most everyday circumstances. When white light struck a green leaf, people believed that the leaf was adding green to. Light is electromagnetic radiation that has properties of waves. The information is based on many laboratory studies and records of a large number of existing structures that have provided satisfactory service for more than 85 years. Those light rays that passing through the hole form the image of the object. The wavelength of light is the distances between peaks in the waves as light travels. A photon is the smallest quantity quantum of energy which can be transported, and it was the realization that light travelled in discrete quanta that was the origins of quantum theory. There is a plethora of lighting equipment on the market that you can acquire once you have found your preferred genre or niche in photography weddings, portraiture, landscape, glamour. Physicists now recognize that light sometimes behaves like waves and, at other times, like particles. The word laser has become a household word, but it didnt start out as a word. Properties of light university of maryland college of. In this way, newton showed that colour was a property of visible light.
This property forms the basis of the fields of optics and optical communications and a myriad of related technologies, both mature and emerging. Easy, fun way to help your students learn physical science vocabulary and prepare for the 5th grade science staar test. Tap the plus button at the bottom right of the screen, then tap the sensor button circle with a wavy line in the toolbar. Oct 16, 2019 first, we will examine the wavelike properties of light. Convex lens thicker in the center than the edges bends light in.
Visible light is one type of electromagnetic radiation, which is a form of energy that exhibits wavelike behavior as it moves through space. However, this wave theory, developed in the mid19th century, is not sufficient to explain the properties of. Important physical properties light waves travel in air at a constant velocity until they penetrate another medium, such as glass or water, at which point they are suddenly slowed, causing the rays to bend. First, we will examine the wavelike properties of light. He proposed that white light such as sunlight is the result of mixing together all the different colours of light. If you do not shine orange light on it, it will appear black. To save the metadata to an external file, click save and name the file. Chapter 4 many properties of light can be understood using a wave model of light. The bending of light waves because of a change in velocity is called refraction. Summary of properties of light geometrical optics siyavula. Chapter 2 properties of light gabriel popescu university of illinois at urbana. Divide into groups and allow each group to experiment with a flashlight. If this will not work for you, please go the lesson and copy the lab report from there.
To prove the monocromaticity of laser light, we can use prism. Laser light is monochromatic, directional, and coherent. Thousands of red, green and blue phosphor dots emit light to make the images seen on monitors. Introduction to light and color introduction to light light is a form of radiant energy or energy that travels in waves. Light amplification by the stimulated emission of radiation properties first, lets discuss the properties of laser light and then we will go into how is is created. You might draw a series of parallel lines showing the path of. Light is composed of energy particles called photons and can behave as either a wave or as separate particles. If you move the pencil rapidly, the waves will be larger and close together. In fact, the very act of seeing means receiving light and forming images in your mind from the light received by. The optical properties depend on the manner that visible light is transmitted through the crystal, and thus are dependent on crystal structure, crystal symmetry, and chemical composition of the mineral. Electromagnetic radiation emr moving along rays in space.
The optical properties depend on the manner that visible light is transmitted through the crystal, and thus are. Monochromatic the light emitted from a laser is monochromatic. For most purposes, we may represent light in terms of its magnitude and direction. Speed of light depends on media medium speed ms refractive index vacuum 3 x 108 air 2. A beam of sunlight through a window lights up a section of the floor. Light wave properties of light reflection refraction diffraction interference 2. Whether you are looking at a light bulb, or a car, or this book, light brings information to your eyes. We investigated the direction and the frequency or color of light in todays lab. This unit helps students explore the properties of light.
Starting from einstein we are talking about the duality of particles, where each particle has also certain wave properties. Other objects which do not give out light are called non luminous objects. Mar 24, 2020 in most everyday circumstances, the properties of light can be derived from the theory of classical electromagnetism, in which light is described as coupled electric and magnetic fields propagating through space as a traveling wave. Understanding basic light properties for photography. Remind your 5th graders about the properties of light by having them examine this chapter. Light properties of light university of washington. Jan 21, 2020 in this simple device the image formation of a stationary object is formed on a photographic film or a white paper sheet. Visible light is usually defined as having wavelengths in the range of 400700 nanometers nm, or 4. A tracing paper,frosted glass and waxed paper are translucent materials. Product description this product is designed to help students master academic vocabulary and can be used to supplement a wellbalanced science curriculum. A tv screen or computer monitor creates color using the primary colors of light. Lens curved glass or transparent material that refracts light. Direct groups to watch while teacher directs the ray of light to the mirror.
Theyhaveenergy,andonemeasure of this energy is the wavelength of the light. This short video explains one of the most important thing around us light. Is the change in direction of a wave when it reaches a surface and bounces off that surface. From these three colors a wide range of colors can be produced. Refraction bending of light waves due to a change in speed. Definition and properties of laser light environmental.
Thermophysical properties database of materials for light. Typically, properties of lightweight concrete have been compared with those of. Champpgaign beckman institute quantitative lightimaging laboratory principles of optical imaging electrical and computer engineering, uiuc. Explain the mechanism that causes light to be polarized, explain the use of. The optical properties of crystals are, next to xray diffraction and direct chemical analyses, the most reliable properties available to distinguish and identify minerals. We see that clearly when we put an object halfway into water and we see that the outside lines dont match up. This video response worksheet and key is based on the bbc documentary series andrew marrs history of the world episode 4.
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