oct06
... radiation causes those charges to oscillate up and down. In the case of the long wavelength radiation the charge at right oscillates slowly. This is low frequency and low energy motion. The short wavelength causes the charge at right to oscillate more rapidly - high frequency and high energy. These ...
... radiation causes those charges to oscillate up and down. In the case of the long wavelength radiation the charge at right oscillates slowly. This is low frequency and low energy motion. The short wavelength causes the charge at right to oscillate more rapidly - high frequency and high energy. These ...
Review questions:
... 59. What is needed for ALL waves to continue moving? 60. Describe the period of a wave. 61. Describe the motion of a water wave. 62. What is the relationship between the frequency and wavelength of a wave? 63. How does a transverse wave travel and how does a longitudinal wave travel? 64. What is the ...
... 59. What is needed for ALL waves to continue moving? 60. Describe the period of a wave. 61. Describe the motion of a water wave. 62. What is the relationship between the frequency and wavelength of a wave? 63. How does a transverse wave travel and how does a longitudinal wave travel? 64. What is the ...
Notes with questions - Department of Physics and Astronomy
... time required to complete one cycle ...
... time required to complete one cycle ...
Chapter 21: Electric Charge and Electric Field
... 1) The E and B fields are always at right angles to each other. 2) The propagation of the fields, i.e., their direction of travel away from the oscillating dipole, is perpendicular to the direction in which the fields point at any given position in space. 3) In a location far from the dipole, the el ...
... 1) The E and B fields are always at right angles to each other. 2) The propagation of the fields, i.e., their direction of travel away from the oscillating dipole, is perpendicular to the direction in which the fields point at any given position in space. 3) In a location far from the dipole, the el ...
Prezentacja programu PowerPoint
... Properties of EM Waves • The solutions to Maxwell’s equations in free space are wavelike • Electromagnetic waves travel through free space at the speed of light. • The electric and magnetic fields of a plane wave are perpendicular to each other and the direction of propagation (they are transverse) ...
... Properties of EM Waves • The solutions to Maxwell’s equations in free space are wavelike • Electromagnetic waves travel through free space at the speed of light. • The electric and magnetic fields of a plane wave are perpendicular to each other and the direction of propagation (they are transverse) ...
HNRS 227 Lecture #2 Chapters 2 and 3
... The electrons move rapidly inside a wire bouncing against each other like molecules in a gas. Since so many collisions occur, an individual electron cannot move from one end of a wire to another rapidly. The electric field inside the wire, which exerts a force on the electrons, can move rapidly thou ...
... The electrons move rapidly inside a wire bouncing against each other like molecules in a gas. Since so many collisions occur, an individual electron cannot move from one end of a wire to another rapidly. The electric field inside the wire, which exerts a force on the electrons, can move rapidly thou ...
DCAS Review of Energy Across the Systems
... When the oscillation (back and forth or up and down motion) of a wave is perpendicular to the direction in which the wave travels, the wave is called a transverse wave. The peak, or highest point, of a transverse wave is the crest. The valley, or lowest point, between the two crest is the trough. El ...
... When the oscillation (back and forth or up and down motion) of a wave is perpendicular to the direction in which the wave travels, the wave is called a transverse wave. The peak, or highest point, of a transverse wave is the crest. The valley, or lowest point, between the two crest is the trough. El ...
2012_spring online homework 12 solution
... pictured in the figure at time t = 0 . Note that we have only drawn the field vectors along the x axis. In fact, this idealized wave fills all space, but the field vectors only vary in the x direction. We expect this wave to satisfy Maxwell's equations. For it to do so, we will find that the followi ...
... pictured in the figure at time t = 0 . Note that we have only drawn the field vectors along the x axis. In fact, this idealized wave fills all space, but the field vectors only vary in the x direction. We expect this wave to satisfy Maxwell's equations. For it to do so, we will find that the followi ...
Electromagnetic surveying
... • The very broad frequency spectrum can be filtered to select a depth of investigation up to 1 km (AMT soundings) • Method sensitive to noise in urban areas ...
... • The very broad frequency spectrum can be filtered to select a depth of investigation up to 1 km (AMT soundings) • Method sensitive to noise in urban areas ...
Monday, Nov. 28, 2005 - UTA HEP WWW Home Page
... produced using electronic devices • Higher frequency waves are produced natural processes, such as emission from atoms, molecules or nuclei • Or they can be produced from acceleration of charged particles • Infrared radiation (IR) is mainly responsible for the heating effect of the Sun – The Sun emi ...
... produced using electronic devices • Higher frequency waves are produced natural processes, such as emission from atoms, molecules or nuclei • Or they can be produced from acceleration of charged particles • Infrared radiation (IR) is mainly responsible for the heating effect of the Sun – The Sun emi ...
Monday, Nov. 28, 2005 - UTA HEP WWW Home Page
... – Charge was rushed back and forth in a short period of time, generating waves with frequency about 109Hz (these are called radio waves) – He detected using a loop of wire in which an emf was produced when a changing magnetic field passed through – These waves were later shown to travel at the speed ...
... – Charge was rushed back and forth in a short period of time, generating waves with frequency about 109Hz (these are called radio waves) – He detected using a loop of wire in which an emf was produced when a changing magnetic field passed through – These waves were later shown to travel at the speed ...
Electricity and Magnetism
... K1. State Maxwell’s equations in differential form and the three constitutive equations. K2. State the equation of conservation of electromagnetic energy, explaining the meaning of each term. K3. Derive the homogeneous wave equation for an electromagnetic wave propagating in a linear, homogeneous, i ...
... K1. State Maxwell’s equations in differential form and the three constitutive equations. K2. State the equation of conservation of electromagnetic energy, explaining the meaning of each term. K3. Derive the homogeneous wave equation for an electromagnetic wave propagating in a linear, homogeneous, i ...
Vol. 19, No 4, Nov 2016
... momentary electric current was induced in the other coil. He then found that if he moved a magnet through a loop of wire, or vice versa, an electric current also flowed in the wire. He proposed that electromagnetic forces and fields extended into empty space around the conductor. Faraday proposed th ...
... momentary electric current was induced in the other coil. He then found that if he moved a magnet through a loop of wire, or vice versa, an electric current also flowed in the wire. He proposed that electromagnetic forces and fields extended into empty space around the conductor. Faraday proposed th ...
Uniform Plane Wave Solution to Maxwell`s Equations
... Ampere law (2) describe how time–varying electric fields produce time–varying magnetic fields, which produce time–varying electric fields, which produce... In a nutshell, this is why electromagnetic radiation is able to propagate, even in “free space” or a vacuum. Once there is a change in one quant ...
... Ampere law (2) describe how time–varying electric fields produce time–varying magnetic fields, which produce time–varying electric fields, which produce... In a nutshell, this is why electromagnetic radiation is able to propagate, even in “free space” or a vacuum. Once there is a change in one quant ...
P1 revision fact sheet
... Surface area – the bigger the surface area the more infrared waves can be emitted = faster rate of transfer Volume – the smaller the volume the faster the rate of transfer Material – conductors transfer at a faster rate, darker matt surfaces transfer at a ...
... Surface area – the bigger the surface area the more infrared waves can be emitted = faster rate of transfer Volume – the smaller the volume the faster the rate of transfer Material – conductors transfer at a faster rate, darker matt surfaces transfer at a ...
Notes 26
... 32.22) A sinusoidal electromagnetic wave emitted by a cell phone has a wavelength of 35.4 cm and an electric field amplitude of 5.4 x 10-2 V/m at a distance of 250 m from the antenna. (a) What is the magnetic field amplitude? (b) The intensity? (C) The total average power? ...
... 32.22) A sinusoidal electromagnetic wave emitted by a cell phone has a wavelength of 35.4 cm and an electric field amplitude of 5.4 x 10-2 V/m at a distance of 250 m from the antenna. (a) What is the magnetic field amplitude? (b) The intensity? (C) The total average power? ...
CH 31 solutions to assigned problems
... 18. The length of the pulse is d ct. Use this to find the number of wavelengths in a pulse. ...
... 18. The length of the pulse is d ct. Use this to find the number of wavelengths in a pulse. ...
Ch 33 Electromagnetic Waves I
... varies sinusoidally i(t), the magnetic field B(t) produced by the current varies in magnitude and direction. Together the changing fields form an EM wave that travels away from the antenna at speed c. The angular frequency of this wave is ω, the same as that of the LC oscillator. ...
... varies sinusoidally i(t), the magnetic field B(t) produced by the current varies in magnitude and direction. Together the changing fields form an EM wave that travels away from the antenna at speed c. The angular frequency of this wave is ω, the same as that of the LC oscillator. ...
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.