Nelectromagnetic waves ppt pdf documentation

Making electromagnetic waves the electric and magnetic fields vibrate at right angles to the direction the wave travels so it is a transverse wave. To adjust the wavelength and simultaneously, the frequency of the wave, translate either the wavelength or frequency sliders to the left or right. Wave a periodic disturbance in a solid, liquid or gas as energy is transmitted through a medium waves carry energy bc they do work waves create wave fronts circles that have the same amount of total energy but as the. The propagating electric and magnetic ripples interact with and support each other. The new book, at the difference of the previous ones, contains four new appendices. The reduction of radiation exposure dose to medical personnel by using breathing circuit in brain ct scan requiring manual ventilation.

Students learn the basics of the electromagnetic spectrum and how. Ionizing and nonionizing radiation study guide aocopm. All electromagnetic waves travel at the same speed 300,000,000 metres per second, which is the speed of light. Electromagnetic waves electromagnetic radiation waves. In contrast to transverse waves, longitudinal are waves in which the medium moves back and forth in the same direction as the motion of the wave. Em waves powerpoint presentation, physics, class 12. What are the characteristics of mechanical and electromagnetic waves. The speed of light is pretty fast but it is finite.

Exploring the electromagnetic spectrum lesson teachengineering. Electromagnetic waves can be used in a variety of ways. Suppose an electromagnetic plane wave with direction of propagation to be constructed, where is a. The electromagnetic spectrum can be expressed in different terms, or units. Electromagnetic waves can exist at any frequency, not just at the frequencies of visible light. To see how a changing electric field gives rise to a magnetic field, let us consider the process of charging of a capacitor and apply amperes circuital law given by chapter 4 b. Electromagnetic radiation list of high impact articles ppts. Introduction to the electromagnetic spectrum science mission. The visible electromagnetic spectrum goal the goal is to introduce the visible electromagnetic spectrum to students through use of materials readily available to most high school science classes. To calculate the intensity of light transmitted through a series of polarizing filters. We use them to communicate, cook, and for medical purposes. Electromagnetic plane wave of frequency and wave vector.

While ionizing radiation is short wavelengthhigh frequency higher energy. Sep 11, 2014 making electromagnetic waves an em wave travels in all directions. In the first hyperframe em field frame, this can be seen to be simply a space charge of electrons conducting a wave disturbance through it, or a piece of ordinary conductive matter conducting an ordinary em wave. Waves powerpoint presentation electromagnetic radiation. The shortest wavelengths are just fractions of the size of an atom, while the longest wavelengths scientists currently study can be larger than the diameter of our planet. Electromagnetic radiation is characterized by a broad range of wavelengths and frequencies, each associated with a specific intensity or amplitude and quantity of energy. The grades of the quiz will be taken into you ca for semester 2, and you can only do it once, so please make sure you understand the content of this unit. Feb 06, 2016 a worksheet that will guide students to working with the em spectrum and getting used to working with frequency, wavelength and energy of a wave. Electromagnetic waves properties of electromagnetic waves. Mechanical waves longitudinal transverse slinky sound wave water wave a wave at a ball game guitar string flag waving in the wind shaking a rope water wave electromagnetic waves light. Electromagnetic wave theory, part 2 contains the proceedings of a symposium on electromagnetic wave theory held at delft, the netherlands in september 1965. The electromagnetic spectrum introductionvisible light 1 instructors guide to lab no. Electromagnetic waves unlike the waves we met last semester, such as sound waves or waves on a string, no medium is required it is not atoms moving around, but instead the electric and magnetic.

Making electromagnetic waves an em wave travels in all directions. Electromagnetic spectrum application electromagneticspectrumfullchartpdfd147735. The vector r denotes the location in space where the. We deal with both normal and nonnormal angles of incidence. How do changes in one part of a wave affect other parts of a wave. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. Narayana rao, a fellow alumnus of the madras institute of technology and an eminent teacher, sent me a copy of the u. When electromagnetic waves hit a surface, they can be reflected, absorbed or transmitted. About electromagnetic waves when you listen to the radio, watch tv, or cook dinner in a microwave oven, you are using electromagnetic waves.

The symposium provided a forum for discussing electromagnetic wave theory and tackled a wide range of topics, from propagation in nonlinear media to electromagnetic wave propagation and. Uses include sterilizing medical equipment and cancer treatment. Electromagnetic waves all electromagnetic waves travel at the same speed through space the speed of light gamma rays, xrays, ultraviolet waves, light, infrared rays, microwaves, and radio waves are all electromagnetic waves with different wavelengths some substances absorb em waves, some reflect them and others transmit them. The shortest wavelengths are just fractions of the size of an atom, while the longest wavelengths scientists currently study can be larger than the diameter of. Substitute amperes law for a charge and currentfree region. Discussion will then focus on the classification of waves briefly look at the effects of hole size in relation to wavelength in diffraction of water waves an. Hakami department of information and communication technologies, arab open university, jeddah, ksa email. Chapter maxwells equations and electromagnetic waves.

Hakami department of information and communication technologies, arab open university, jeddah, ksa. Frequency is measured in cycles per second hertz or hz or khz, wavelength is measured in meters m or nanometers nm. Radiation interactions with matter emission release of electromagnetic waves absorption receiving of electromagnetic waves scattering deflection of electromagnetic waves in all directions reflection deflection of electromagnetic waves into the backwards direction interactions with the atmosphere why is the sky blue. Waves powerpoint presentation electromagnetic radiation waves. When all the waves are seen together, they make white light. A worksheet that will guide students to working with the em spectrum and getting used to working with frequency, wavelength and energy of a wave. G givens write them all down with symbols, numbers and units u unknown write down the unknown with a. Traveling em wave induced electric and induced magnetic amplitudes. Winner of the standing ovation award for best powerpoint templates from presentations magazine. The article below elaborates on the origin and theory of electromagnetic waves. This is the threedimensional wave equation in vector form.

This was the first prediction of radio waves, xrays, etc. To study the properties of electromagnetic fields and waves. For example, light waves are reflected by skin but xrays pass straight through. Electromagnetic waves are created by oscillating electric and magnetic fields.

They can go forever until absorbed by some charges along the way. To understand the properties of different types of electromagnetic waves. The radio in your car receives the radio waves, decodes the information, and uses a speaker to change. Electromagnetic waves travel through vacuum without the requirement of a medium.

The wavelength and frequency of electromagnetic waves vary from very long wavelengths to extremely short. In this discussion, vectors are denoted by boldfaced underscored lowercase letters, e. Reflection, refraction,snell os law, internal reflection. Electromagnetic energy travels in waves and spans a broad spectrum from very. Lessons lecture notes the physics classroom conceptual light waves and color. The ratio of the efield to the bfield is constant and equal to the velocity cc electromagnetic waves carry both energy and momentum and can exert pressure on surfaces. This follows from the relativity fact that energy is equivalent. The electromagnetic radiation includes radar waves, infrared radiation, light. Ppt electromagnetic waves powerpoint presentation free. Wavelength electromagnetic waves have crests and troughs similar to those of ocean waves. Introduction electromagnetic theory is a discipline concerned with the study of charges at rest and in motion. Mother of em waves modification to ampere circuital law 7 amperes law statement.

Electromagnetic radiation high impact list of articles ppts journals 12608. Preface to the present edition the present book titled, electromagnetics. Electromagnetic waves oscillating charges also generate a oscillating current, which in turn produces oscillating magnetic field ripples propagating away. May 19, 2020 em waves powerpoint presentation, physics, class 12, cbse, ncert class 12 notes edurev is made by best teachers of class 12. Chapter 6 maxwells equations for electromagnetic waves. Gamma rays are electromagnetic radiation resulting from nuclear transformation. Electromagnetics and applications mit opencourseware. Classical and relativistic approaches, is an extended form of the previous two editions of the books titled electromagnetics. Electromagnetism is defined as the combination of alternating electric and magnetic fields created by accelerated charges that propagate out from these charges at the speed of light in. The electromagnetic spectrum t e harrington middle school. Electromagnetic waves free download as powerpoint presentation. Line integral of magnetic field around a closed path is equal to the current enclosed by that path amperes law 1 dqdt q 00 inconsistency in amperes law t current o transportation of charged particles w.

Red has the longest wavelength and violet has the shortest wavelength. A free powerpoint ppt presentation displayed as a flash slide show on id. Em waves powerpoint presentation, physics, class 12, cbse. Waves powerpoint presentation free download as powerpoint presentation. Electromagnetic wave theory a university of washington. Both e e and b b are perpendicular to wave velocity c. This document is highly rated by class 12 students and has been viewed 5922 times.

Waves to understand a laser beam, we need to know how electric and magnetic fields change with time. An intermediate level course richard fitzpatrick professor of physics the university of texas at austin. Aug 18, 2016 may 19, 2020 em waves powerpoint presentation, physics, class 12, cbse, ncert class 12 notes edurev is made by best teachers of class 12. All electromagnetic waves must travel in a vacuum with the same speed, a speed that we now call the speed of light. It looks more familiar when reduced a plane wave with field in the xdirection only.

Radio waves, television waves, and microwaves are all types of electromagnetic waves. The speed of the wave is given by v c k, equivalent to c f. The figure only shows a wave traveling in one direction. Ionizing radiation has sufficient energy to produce ions in matter at the molecular level. Lesson overview in this lesson, students will learn the conceptsterms used in wave propagation. All electromagnetic waves travel at the same speed. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. Energies associated with waves in the tutorial appear beneath the window and are given in units of kjmole. Light can thus conduct neutrinic waves containing bioenergy or eloptic energy, as t. This information will be particularly interesting to students who have studied electromagnetism already. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Download as ppt, pdf, txt or read online from scribd. Examples of transverse waves water waves are known as transverse waves obviously because the motion of the water is up and down, or at right angles to the direction in which the waves are travelling.

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