# Nelectromagnetic waves ppt pdf documentation

Introduction electromagnetic theory is a discipline concerned with the study of charges at rest and in motion. What are the characteristics of mechanical and electromagnetic waves. The new book, at the difference of the previous ones, contains four new appendices. Traveling em wave induced electric and induced magnetic amplitudes. This means that although they appear to be very different, in fact theyre all made of the same kind of vibrations but at different. Electromagnetic waves can exist at any frequency, not just at the frequencies of visible light. Mother of em waves modification to ampere circuital law 7 amperes law statement. Making electromagnetic waves the electric and magnetic fields vibrate at right angles to the direction the wave travels so it is a transverse wave. This document is highly rated by class 12 students and has been viewed 5922 times. Electromagnetic radiation list of high impact articles ppts.

Electromagnetic waves free download as powerpoint presentation. 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. 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 theory is also indispensable to the understanding, analysis and design of various electrical, electromechanical and electronic systems electromagnetic theory is a. Visible light waves visible light waves are the only electromagnetic waves we can see. The reduction of radiation exposure dose to medical personnel by using breathing circuit in brain ct scan requiring manual ventilation. For example, light waves are reflected by skin but xrays pass straight through. This was the first prediction of radio waves, xrays, etc.

Lecture notes 6 electromagnetic waves in matter electromagnetic wave propagation in linear media we now consider em wave propagation inside linear matter, but only in regions where there are no free charges free 0 andor free currents kfree 0 i. The electromagnetic spectrum introductionvisible light 1 instructors guide to lab no. Substitute amperes law for a charge and currentfree region. When electromagnetic waves hit a surface, they can be reflected, absorbed or transmitted. Basic electromagnetic wave properties java tutorial. 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 vector r denotes the location in space where the. Students learn the basics of the electromagnetic spectrum and how. This follows from the relativity fact that energy is equivalent. 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. 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.

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. Preface to the present edition the present book titled, electromagnetics. 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. 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. Energies associated with waves in the tutorial appear beneath the window and are given in units of kjmole. When all the waves are seen together, they make white light. Download as ppt, pdf, txt or read online from scribd. Exploring the electromagnetic spectrum lesson teachengineering. To understand the properties of different types of electromagnetic waves. Electromagnetic plane wave of frequency and wave vector.

Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. All electromagnetic waves travel at the same speed. Electromagnetic principles are fundamental to the study of electrical engineering and physics. Introduction to the electromagnetic spectrum science mission. Classical and relativistic approaches, is an extended form of the previous two editions of the books titled electromagnetics. In this discussion, vectors are denoted by boldfaced underscored lowercase letters, e. Suppose an electromagnetic plane wave with direction of propagation to be constructed, where is a.

This information will be particularly interesting to students who have studied electromagnetism already. How do changes in one part of a wave affect other parts of a wave. To calculate the intensity of light transmitted through a series of polarizing filters. 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. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. 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. 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. While ionizing radiation is short wavelengthhigh frequency higher energy. To study the properties of electromagnetic fields and waves. 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 waves are created by oscillating electric and magnetic fields. Wavelength electromagnetic waves have crests and troughs similar to those of ocean waves.

This is the threedimensional wave equation in vector form. 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. The article below elaborates on the origin and theory of electromagnetic waves. The speed of light is pretty fast but it is finite. The electromagnetic radiation includes radar waves, infrared radiation, light. 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. All electromagnetic waves travel at the same speed 300,000,000 metres per second, which is the speed of light. They can go forever until absorbed by some charges along the way.

Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. 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, cbse. Electromagnetic waves properties of electromagnetic waves. Lesson overview in this lesson, students will learn the conceptsterms used in wave propagation. The figure only shows a wave traveling in one direction. 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.

The electromagnetic spectrum t e harrington middle school. Em waves powerpoint presentation, physics, class 12. Reflection, refraction,snell os law, internal reflection. About electromagnetic waves when you listen to the radio, watch tv, or cook dinner in a microwave oven, you are using electromagnetic waves. How the waves behave, depends on their energy and the type of material. Electromagnetic waves oscillating charges also generate a oscillating current, which in turn produces oscillating magnetic field ripples propagating away. 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 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. Electromagnetic spectrum application electromagneticspectrumfullchartpdfd147735. Both e e and b b are perpendicular to wave velocity c. Electromagnetic waves electromagnetic radiation waves. Frequency is measured in cycles per second hertz or hz or khz, wavelength is measured in meters m or nanometers nm. May 19, 2020 em waves powerpoint presentation, physics, class 12, cbse, ncert class 12 notes edurev is made by best teachers of class 12.

Ionizing radiation has sufficient energy to produce ions in matter at the molecular level. A free powerpoint ppt presentation displayed as a flash slide show on id. 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. Chapter maxwells equations and electromagnetic waves. Electromagnetic wave theory a university of washington.

Electromagnetic energy travels in waves and spans a broad spectrum from very. Narayana rao, a fellow alumnus of the madras institute of technology and an eminent teacher, sent me a copy of the u. Electromagnetic waves travel through vacuum without the requirement of a medium. 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. Lessons lecture notes the physics classroom conceptual light waves and color. Ppt electromagnetic waves powerpoint presentation free. 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. Making electromagnetic waves an em wave travels in all directions. Sep 11, 2014 making electromagnetic waves an em wave travels in all directions.

Electromagnetics and applications mit opencourseware. Gamma rays are electromagnetic radiation resulting from nuclear transformation. We deal with both normal and nonnormal angles of incidence. Examples of timedependent electromagnetic phenomena include highspeed circuits, transmission lines, radar, and optical communications. The speed of the wave is given by v c k, equivalent to c f. 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. The radio in your car receives the radio waves, decodes the information, and uses a speaker to change. Hakami department of information and communication technologies, arab open university, jeddah, ksa. Electromagnetic waves can be used in a variety of ways. An intermediate level course richard fitzpatrick professor of physics the university of texas at austin. Light can thus conduct neutrinic waves containing bioenergy or eloptic energy, as t. Uses include sterilizing medical equipment and cancer treatment. All electromagnetic waves must travel in a vacuum with the same speed, a speed that we now call the speed of light. Electromagnetic wave theory, part 2 contains the proceedings of a symposium on electromagnetic wave theory held at delft, the netherlands in september 1965.

We use them to communicate, cook, and for medical purposes. Hakami department of information and communication technologies, arab open university, jeddah, ksa email. The electromagnetic spectrum can be expressed in different terms, or units. Waves to understand a laser beam, we need to know how electric and magnetic fields change with time. It looks more familiar when reduced a plane wave with field in the xdirection only.

Waves powerpoint presentation free download as powerpoint presentation. 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. The propagating electric and magnetic ripples interact with and support each other. Red has the longest wavelength and violet has the shortest wavelength. Chapter 6 maxwells equations for electromagnetic waves. Waves powerpoint presentation electromagnetic radiation.

Ionizing and nonionizing radiation study guide aocopm. G givens write them all down with symbols, numbers and units u unknown write down the unknown with a. Waves powerpoint presentation electromagnetic radiation waves. Radio waves, television waves, and microwaves are all types of electromagnetic waves. Introduction to radiation physics, quantities and units radccore. The wavelength and frequency of electromagnetic waves vary from very long wavelengths to extremely short. 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. To adjust the wavelength and simultaneously, the frequency of the wave, translate either the wavelength or frequency sliders to the left or right. Winner of the standing ovation award for best powerpoint templates from presentations magazine. Electromagnetic radiation high impact list of articles ppts journals 12608.

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