electric field magnetic field
... • the EM wave propagates because the electric field recreates the magnetic field and the magnetic field recreates the electric field • an oscillating voltage applied to the antenna makes the charges in the antenna vibrate up and down sending out a synchronized pattern of electric and magnetic fields ...
... • the EM wave propagates because the electric field recreates the magnetic field and the magnetic field recreates the electric field • an oscillating voltage applied to the antenna makes the charges in the antenna vibrate up and down sending out a synchronized pattern of electric and magnetic fields ...
PPT - LSU Physics
... h in Fig. 33-6 is fixed at point P on the x axis and in the xy plane. As the electromagnetic wave moves rightward past the rectangle, the magnetic flux B through the rectangle changes and— according to Faraday’s law of induction— induced electric fields appear throughout the region of the rectangle. ...
... h in Fig. 33-6 is fixed at point P on the x axis and in the xy plane. As the electromagnetic wave moves rightward past the rectangle, the magnetic flux B through the rectangle changes and— according to Faraday’s law of induction— induced electric fields appear throughout the region of the rectangle. ...
Electromagnetic Waves File
... •Suspended sediment in the water can scatter the laser reducing the amount of energy reaching the bottom. •Water tends to absorb the light that passes through it. •The seabed also absorbs light. •Only a small fraction of the energy actually return to the aircraft as it scans from side to side and th ...
... •Suspended sediment in the water can scatter the laser reducing the amount of energy reaching the bottom. •Water tends to absorb the light that passes through it. •The seabed also absorbs light. •Only a small fraction of the energy actually return to the aircraft as it scans from side to side and th ...
lecture 2 PDF document
... From Maxwell's equations one can derive another equation which has the form of a “wave equation”. ...
... From Maxwell's equations one can derive another equation which has the form of a “wave equation”. ...
ECE 342: Electromagnetic Fields II Concepts: Maxwell’s Equations
... properties of material media in relation with field eqs - Understand how electromagnetic material properties can be exploited in engineering applications - Understand and appreciate EM field theory as a foundation of circuit theory and electrical engineering as a whole ...
... properties of material media in relation with field eqs - Understand how electromagnetic material properties can be exploited in engineering applications - Understand and appreciate EM field theory as a foundation of circuit theory and electrical engineering as a whole ...
Physical Science EOCT Review Domain IV Waves, Electricity and
... If you charge a balloon by rubbing it on your hair, it picks up extra electrons and has a negative charge. Holding it near a neutral object will make the charges in that object move. If it is a conductor, many electrons move easily to the other side, as far from the balloon as possible. If it is an ...
... If you charge a balloon by rubbing it on your hair, it picks up extra electrons and has a negative charge. Holding it near a neutral object will make the charges in that object move. If it is a conductor, many electrons move easily to the other side, as far from the balloon as possible. If it is an ...
Chapter 34
... antenna is the continuous induction of an electric field by the time-varying magnetic field and the induction of a magnetic field by a time-varying electric field The electric and magnetic field produced in this manner are in phase with each other and vary as 1/r The result is the outward flow of en ...
... antenna is the continuous induction of an electric field by the time-varying magnetic field and the induction of a magnetic field by a time-varying electric field The electric and magnetic field produced in this manner are in phase with each other and vary as 1/r The result is the outward flow of en ...
Electromagnetic Waves - Galileo and Einstein
... • Although the radio wave looks complicated near the transmitter, far away (meaning more than a few wavelengths) it has the familiar form shown above, the direction of propagation being directly away from the source. • For the wave shown above, generated by a vertical transmitting antenna, reception ...
... • Although the radio wave looks complicated near the transmitter, far away (meaning more than a few wavelengths) it has the familiar form shown above, the direction of propagation being directly away from the source. • For the wave shown above, generated by a vertical transmitting antenna, reception ...
Phys2102 Spring 2002
... and Morley looked and looked, and decided it wasn’t there. How do waves travel??? Electricity and magnetism are “relative”: Whether charges move or not depends on which frame we use… This was how Einstein began thinking about his “theory of special relativity”… We’ll leave that theory for later. ...
... and Morley looked and looked, and decided it wasn’t there. How do waves travel??? Electricity and magnetism are “relative”: Whether charges move or not depends on which frame we use… This was how Einstein began thinking about his “theory of special relativity”… We’ll leave that theory for later. ...
The problem of spherically symmetric electromagnetic radiation
... passes at the point Q whose distance from the equator is greater than ⑀ 共see Fig. 1兲. 共2兲 Otherwise. Assume that case 共1兲 holds. Thus after reaching point Q, the trajectory C is closed by adding to it the shorter part C ⬘ of the great circle that passes through P and Q 共the arc QRP in Fig. 1兲. Evide ...
... passes at the point Q whose distance from the equator is greater than ⑀ 共see Fig. 1兲. 共2兲 Otherwise. Assume that case 共1兲 holds. Thus after reaching point Q, the trajectory C is closed by adding to it the shorter part C ⬘ of the great circle that passes through P and Q 共the arc QRP in Fig. 1兲. Evide ...
chapter34
... antenna is the continuous induction of an electric field by the time-varying magnetic field and the induction of a magnetic field by a time-varying electric field The electric and magnetic field produced in this manner are in phase with each other and vary as 1/r The result is the outward flow of en ...
... antenna is the continuous induction of an electric field by the time-varying magnetic field and the induction of a magnetic field by a time-varying electric field The electric and magnetic field produced in this manner are in phase with each other and vary as 1/r The result is the outward flow of en ...
Transformations of Energy Notes
... Mechanical waves must move through solids, liquids, or gases to transport their energy. Electromagnetic waves can travel through a vacuum (empty space). The matter that a wave travels through is called a medium. For example, the medium through which a wave travels in the ocean is the water. The cres ...
... Mechanical waves must move through solids, liquids, or gases to transport their energy. Electromagnetic waves can travel through a vacuum (empty space). The matter that a wave travels through is called a medium. For example, the medium through which a wave travels in the ocean is the water. The cres ...
Problem set 2
... b) Consider the frequency domain version of Maxwell’s equations. Prove that the two divergence equations (Gauss’ law and the corresponding law for the magnetic field) are redundant. c) Use Maxwell’s equations in the time domain to obtain the wave equation n2 ∂ 2 E ...
... b) Consider the frequency domain version of Maxwell’s equations. Prove that the two divergence equations (Gauss’ law and the corresponding law for the magnetic field) are redundant. c) Use Maxwell’s equations in the time domain to obtain the wave equation n2 ∂ 2 E ...
Module code SP-1202 Module Title Electricity and Magnetism
... problems in electricity and magnetism Higher order: 20% - demonstrate their ability to use laboratory equipment by performing experiments relevant to the module - use an investigative approach to study employing resources such as books, lecture notes, the Internet and other sources. Module Co ...
... problems in electricity and magnetism Higher order: 20% - demonstrate their ability to use laboratory equipment by performing experiments relevant to the module - use an investigative approach to study employing resources such as books, lecture notes, the Internet and other sources. Module Co ...
Atomic and Molecular Physics for Physicists Ben-Gurion University of the Negev
... In non-dispersive, isotropic media, ε and µ are time-independent scalars, and Maxwell's equations reduce to ...
... In non-dispersive, isotropic media, ε and µ are time-independent scalars, and Maxwell's equations reduce to ...
The atmosphere is made up of oxygen and nitrogen mostly. Oxygen
... The atmosphere is made up of oxygen and nitrogen mostly. Oxygen absorbs some solar radiation, but mostly these two molecules only scatter light to make the sky blue. How do they do this? To understand how, we need to understand what is known as dipole radiation. Consider an electric field incident o ...
... The atmosphere is made up of oxygen and nitrogen mostly. Oxygen absorbs some solar radiation, but mostly these two molecules only scatter light to make the sky blue. How do they do this? To understand how, we need to understand what is known as dipole radiation. Consider an electric field incident o ...
Electromagnetic radiation
Electromagnetic radiation (EM radiation or EMR) is the radiant energy released by certain electromagnetic processes. Visible light is one type of electromagnetic radiation, other familiar forms are invisible electromagnetic radiations such as radio waves, infrared light and X rays.Classically, electromagnetic radiation consists of electromagnetic waves, which are synchronized oscillations of electric and magnetic fields that propagate at the speed of light through a vacuum. The oscillations of the two fields are perpendicular to each other and perpendicular to the direction of energy and wave propagation, forming a transverse wave. Electromagnetic waves can be characterized by either the frequency or wavelength of their oscillations to form the electromagnetic spectrum, which includes, in order of increasing frequency and decreasing wavelength: radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays.Electromagnetic waves are produced whenever charged particles are accelerated, and these waves can subsequently interact with any charged particles. EM waves carry energy, momentum and angular momentum away from their source particle and can impart those quantities to matter with which they interact. Quanta of EM waves are called photons, which are massless, but they are still affected by gravity. Electromagnetic radiation is associated with those EM waves that are free to propagate themselves (""radiate"") without the continuing influence of the moving charges that produced them, because they have achieved sufficient distance from those charges. Thus, EMR is sometimes referred to as the far field. In this jargon, the near field refers to EM fields near the charges and current that directly produced them, specifically, electromagnetic induction and electrostatic induction phenomena.In the quantum theory of electromagnetism, EMR consists of photons, the elementary particles responsible for all electromagnetic interactions. Quantum effects provide additional sources of EMR, such as the transition of electrons to lower energy levels in an atom and black-body radiation. The energy of an individual photon is quantized and is greater for photons of higher frequency. This relationship is given by Planck's equation E=hν, where E is the energy per photon, ν is the frequency of the photon, and h is Planck's constant. A single gamma ray photon, for example, might carry ~100,000 times the energy of a single photon of visible light.The effects of EMR upon biological systems (and also to many other chemical systems, under standard conditions) depend both upon the radiation's power and its frequency. For EMR of visible frequencies or lower (i.e., radio, microwave, infrared), the damage done to cells and other materials is determined mainly by power and caused primarily by heating effects from the combined energy transfer of many photons. By contrast, for ultraviolet and higher frequencies (i.e., X-rays and gamma rays), chemical materials and living cells can be further damaged beyond that done by simple heating, since individual photons of such high frequency have enough energy to cause direct molecular damage.