Wednesday, July 29, 2009
... • New field lines in the opposite direction forms • While the original field lines still propagates away from the rod reaching out far – Since the original field propagates through an empty space, the field lines must form a closed loop (no ...
... • New field lines in the opposite direction forms • While the original field lines still propagates away from the rod reaching out far – Since the original field propagates through an empty space, the field lines must form a closed loop (no ...
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
... These mobile phones should be in the coverage area of a certain cell; the base station of this cell must assign this mobile phone the necessary RF channel to maintain the connection. To achieve this link, the mobile should use certain transmission power to connect to the base station (uplink) and th ...
... These mobile phones should be in the coverage area of a certain cell; the base station of this cell must assign this mobile phone the necessary RF channel to maintain the connection. To achieve this link, the mobile should use certain transmission power to connect to the base station (uplink) and th ...
On the nature of light - Waves
... • Magnetic force - force between electrically charged particles arising from their motion. This force is also exerted on moving electric charges. – Disturbance produced by moving a charged particle that consists of vibrating electric and magnetic fields, always oriented perpendicular to one another ...
... • Magnetic force - force between electrically charged particles arising from their motion. This force is also exerted on moving electric charges. – Disturbance produced by moving a charged particle that consists of vibrating electric and magnetic fields, always oriented perpendicular to one another ...
Learning station III: What oscillates with light?
... Fields that change in time: waves of a field So could light be a wave of a changing electric and magnetic field? Until now, the fields we’ve described don’t vary in time: they are static fields. Example: the electric field If the source of the field is stationary, the field is static. Here is an exa ...
... Fields that change in time: waves of a field So could light be a wave of a changing electric and magnetic field? Until now, the fields we’ve described don’t vary in time: they are static fields. Example: the electric field If the source of the field is stationary, the field is static. Here is an exa ...
Chapter 2 Plane Waves and Refractive Index
... Maxwell’s equations. This allows us to deal with individual frequencies, one at a time. When considering the propagation of light within a material medium, we are essentially unable to do anything else. Any waveform propagating in a material medium invariably experiences distortion (called dispersio ...
... Maxwell’s equations. This allows us to deal with individual frequencies, one at a time. When considering the propagation of light within a material medium, we are essentially unable to do anything else. Any waveform propagating in a material medium invariably experiences distortion (called dispersio ...
Ch 22) Electromagnetic Waves
... The development of electromagnetic theory in the early part of the nineteenth century by Oersted, Ampère, and others was not actually done in terms of electric and magnetic fields. The idea of the field was introduced somewhat later by Faraday, and was not generally used until Maxwell showed that al ...
... The development of electromagnetic theory in the early part of the nineteenth century by Oersted, Ampère, and others was not actually done in terms of electric and magnetic fields. The idea of the field was introduced somewhat later by Faraday, and was not generally used until Maxwell showed that al ...
Physics: Waves, Sound/Light, Electromagnetic Waves, Magnetism
... 1.3 Recall factors that affect the size of the force on a conductor (triple only) 1.4 Use and rearrange the equation F = B I l (triple only) 7.3 Describe the structure of a transformer (triple only) 7.4 Use and rearrange the transformer equation (triple only) 7.5 Apply this equation to describe the ...
... 1.3 Recall factors that affect the size of the force on a conductor (triple only) 1.4 Use and rearrange the equation F = B I l (triple only) 7.3 Describe the structure of a transformer (triple only) 7.4 Use and rearrange the transformer equation (triple only) 7.5 Apply this equation to describe the ...
Electromagnetic Radiation Energy and Planck` Constant
... electric or magnetic multi-poles by discrete irreducible process of photon emission and absorption connected by continuous processes of propagation [8], these lead some to think that Electromagnetic Radiation (EM-R) doesn’t carries energy, while others gave it some percentage [9] because photon carr ...
... electric or magnetic multi-poles by discrete irreducible process of photon emission and absorption connected by continuous processes of propagation [8], these lead some to think that Electromagnetic Radiation (EM-R) doesn’t carries energy, while others gave it some percentage [9] because photon carr ...
Maxwell`s Equation
... perpendicular. Also perpendicular to direction of propagation. (transverse wave) ...
... perpendicular. Also perpendicular to direction of propagation. (transverse wave) ...
Electricity and Magnetism Maxwell`s Laws Electromagnetic Radiation
... Maxwell’s equations possess the ‘wrong’ symmetry for Gallilean transformations between observers; they are Lorentz-invariant. This gave Einstein an important idea. All observers, no matter how they move relative to one another all agree that any light wave travels at that same speed. ...
... Maxwell’s equations possess the ‘wrong’ symmetry for Gallilean transformations between observers; they are Lorentz-invariant. This gave Einstein an important idea. All observers, no matter how they move relative to one another all agree that any light wave travels at that same speed. ...
Chapter 33 - KFUPM Faculty List
... concerning this type of antenna and electromagnetic waves is false? a) As the potential difference at the terminals varies sinusoidally, electrons move between the ends of the wires. b) When one of the wires has a net positive charge, the other wire has a net negative charge. c) The generator contin ...
... concerning this type of antenna and electromagnetic waves is false? a) As the potential difference at the terminals varies sinusoidally, electrons move between the ends of the wires. b) When one of the wires has a net positive charge, the other wire has a net negative charge. c) The generator contin ...
PHY 121 Algebra-based Physics II
... • Sound Resonance in a Tube (measuring the speed of sound) • Electric Charges (attraction and repulsion; Faraday’s ice pail experiment) ...
... • Sound Resonance in a Tube (measuring the speed of sound) • Electric Charges (attraction and repulsion; Faraday’s ice pail experiment) ...
proposal and modalities for combined geoscientist examination for
... cover any one of these subjects together with a compulsory paper in General English and General studies. It is proposed that broadly the examination should be descriptive and be in two parts in the following pattern; the first part is compulsory and for 300 marks and the second part has an option of ...
... cover any one of these subjects together with a compulsory paper in General English and General studies. It is proposed that broadly the examination should be descriptive and be in two parts in the following pattern; the first part is compulsory and for 300 marks and the second part has an option of ...
Did an 8th century gamma ray burst irradiate the Earth
... In 2012 scientist Fusa Miyake announced the detection of high levels of the isotope Carbon-14 and Beryllium-10 in tree rings formed in 775 CE, suggesting that a burst of radiation struck the Earth in the year 774 or 775. Carbon-14 and Beryllium-10 form when radiation from space collides with nitroge ...
... In 2012 scientist Fusa Miyake announced the detection of high levels of the isotope Carbon-14 and Beryllium-10 in tree rings formed in 775 CE, suggesting that a burst of radiation struck the Earth in the year 774 or 775. Carbon-14 and Beryllium-10 form when radiation from space collides with nitroge ...
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.