Electromagnetic waves example problems what is the frequency green light that has a wavelength of 5. Electromagnetic waves free download as powerpoint presentation. The changing magnetic field and electric fields travel through space as transverse waves at right angles this is known as an electromagnetic wave. Energies associated with waves in the tutorial appear beneath the window and are given in units of kjmole. Download course materials electromagnetic wave theory. Radio waves, television waves, and microwaves are all types of electromagnetic waves. Sounds can be produced at a range of frequencies, from the infrasonic below the range of human hearing to the ultrasonic above the range of human hearing.
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. An electromagnetic wave is a transverse wave that transfers electrical and magnetic energy. We deal with both normal and nonnormal angles of incidence. To calculate the intensity of light transmitted through a series of polarizing filters. Ppt waves powerpoint presentation free to download. The fields e and b and are perpendicular to the direction of propagation v em. Aug 3, 2018 powerpoint presentation on electromagnetic energy. The number of crests or troughs of a wave that passes a given point. Electromagnetic waves are created by oscillating electric and magnetic fields.
Maloney 2 waves are everywhere in nature sound waves, visible light waves, radio waves, microwaves, water waves, sine waves, telephone chord waves, stadium waves, earthquake waves, waves on a string, slinky waves q. Chapter 6 maxwells equations for electromagnetic waves. In physics, electromagnetic radiation em radiation or emr refers to the waves or their quanta, photons of the electromagnetic field, propagating radiating. The electromagnetic spectrum is the complete spectrum or continuum of light including radio waves, infrared, visible light, ultraviolet light, xrays and gamma. The vector r denotes the location in space where the. An introduction to the em spectrum going through each of the different types of waves with their frequencies, wavelengths, uses and dangers. Free radio waves concept powerpoint template designhooks. This document is highly rated by class 12 students and has been viewed 5877 times. The electromagnetic spectrum introductionvisible light 1 instructors guide to lab no. The adobe flash plugin is needed to view this content. 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. Electromagnetic radiation includes visible light, microwaves and xrays.
There is a bit in there about ionising and nonionising radiation too. They can go forever until absorbed by some charges along the way. This means that although they appear to be very different, in fact theyre all made of the same kind of vibrations but at different. The use of electromagnetic radiation, or waves, for therapeutic purposes began in the early 20th century when physicians began using highfrequency currents. Em waves powerpoint presentation, physics, class 12.
Objects in space send out electromagnetic radiation at all wavelengths from gamma rays to radio waves. Fm waves can you see the name in the wave appearance. Lessons lecture notes the physics classroom conceptual light waves and color. 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. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Electromagnetic waves, the electromagnetic spectrum and photons electromagnetic waves and the. When electromagnetic waves travel through space, it is called radiation. About electromagnetic waves when you listen to the radio, watch tv, or cook dinner in a microwave oven, you are using electromagnetic waves. The wavelength and frequency of electromagnetic waves vary from very long wavelengths to extremely short. Radio waves, television waves, and microwaves are all types of electromagnetic.
All that means is you download the lesson package as one file. Winner of the standing ovation award for best powerpoint templates from presentations magazine. Basic electromagnetic wave properties java tutorial. Hence electromagnetic waves are transverse in nature. The electromagnetic spectrum t e harrington middle school. This training material has been developed based on. Define and apply the concepts of energy density, intensity, and pressure pressure due to em waves. Substitute amperes law for a charge and currentfree region. Electromagnetic theory basically discusses the relationship between the electric and magnetic fields. The oscillating electron supplies energy at a certain constant rate so that the power p carried by the radiation is constant.
Physics ii at cbu college courses facstaff home page for cbu. All electromagnetic waves travel at the same speed 300,000,000 metres per second, which is the speed of light. Ppt waves powerpoint presentation free to download id. Lei when an electromagnetic wave travels from one medium to another its speed changes either increases or. Physics waves interactive software experiments and scorm resource for a level physics.
An introduction to electromagnetic wave authorstream. To understand the properties of different types of electromagnetic waves. In this discussion, vectors are denoted by boldfaced underscored lowercase letters, e. Ppt electromagnetic spectrum powerpoint presentation. It gives basic knowledge on properties of the electromagnetic spectrum. The basic principles of electromagnetic theory include electrostatics, electromagnetic induction, magnetic fields of steady currents, etc. Electromagnetic waves can be used in a variety of ways.
Use electromagnetic detector as a scanner or as a emf detector to detect high risk wireless zones. To apply the wave model to the electromagnetic spectrum. Wolga shows why we believe in the unity of the electromagnetic radiation spectrum. The total energy density for an electromagnetic wave is the sum of the two energy densities.
Electron inside an atom, moving at 40% of the speed of light. Principles and problems combines proven, comprehensive content with dynamic multimedia tools and engaging, handson labs to help you get the big ideas of physics. We use them to communicate, cook, and for medical purposes. To adjust the wavelength and simultaneously, the frequency of the wave, translate either the wavelength or frequency sliders to the left or right. Convert your iphone into a emf meter electromagnetic field tester or as a teslameter.
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. Apr 30, 2020 em waves powerpoint presentation, physics, class 12, cbse, ncert class 12 notes edurev is made by best teachers of class 12. Ppt electromagnetic waves powerpoint presentation free. 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. Certain others, such as the prediction of antimatter, will be discussed in later modules. Emanim animates electromagnetic waves in vacuum and in matter.
Variation of maxima and minima in both e vector and b vector occur simultaneously. Can see matter waves in experiments heisenberg uncertainty principle cant know both the exact location and energy of a particle so, for electrons, we do know the energy well, so. He performs experiments which show that the radiation arises from accelerated charges and consists of transverse waves that can be polarized. Electromagnetic radiation and sound waves powerpoint with. The ems is the distribution of em radiation according to energy level or wavelength and includes such things as visible light, heat, radio waves, xrays and gammarays emitted by radioactive elements. The distance between successive crests of a wave, esp. Electromagnetic waves and the electromagnetic spectrum video. Appliances, microwaves and sockets could be now radiating you. This is the threedimensional wave equation in vector form. What is the wavelength of a microwave that has a frequency of 4. 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. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. Remember that power is proportional to the intensity, which is itself proportional to the.
Chapter maxwells equations and electromagnetic waves. Maxwell, 18611862 hertz confirmed this by experiments in 1888. Transverse waves do not require a medium to travel unlike sound. The electromagnetic spectrum can be expressed in different terms, or units. Electromagnetic waves electromagnetic radiation waves. Electric and magnetic fields of faraday can go off the wiggling charges, and propagate in space by themselves.
Absorption of gamma rays,damped simple harmonic motion, diffraction grating,spectrometer,electromagnetic waves,forced oscillations and resonance,hydrogen emission spectra,multiple slit diffraction,polarization,ripple tank models,transverse and longitudinal waves,sound waves,speed of. Maxwells equations contain the wave equation for electromagnetic waves. Powerpoint slides part 3 set 1 magnetic forces and electric motors 60 slides. When electromagnetic waves come in contact with an object, the waves transfer the heat to the object. Find materials for this course in the pages linked along the left. Powerpoint pdf 300dpi the electromagnetic spectrum.