Electromagnetic Radiation and Global Climate change
... • James Clerk Maxwell theorized that electromagnetic waves were disturbances in electromagnetic fields. • A magnetic field can be created by a change in the electric field. • The disturbance in the electromagnetic field is called an electromagnetic wave that does not need a physical medium to propag ...
... • James Clerk Maxwell theorized that electromagnetic waves were disturbances in electromagnetic fields. • A magnetic field can be created by a change in the electric field. • The disturbance in the electromagnetic field is called an electromagnetic wave that does not need a physical medium to propag ...
Electromagnetic Spectrum
... While light actually consists of many different colors, each color has its own special frequency. Red has the lowest at 430 trillion hertz. It also carries the lowest energy. Violet has the highest frequency at 760 trillion hertz and carries the highest energy. ULTRAVIOLET: Found just above visible ...
... While light actually consists of many different colors, each color has its own special frequency. Red has the lowest at 430 trillion hertz. It also carries the lowest energy. Violet has the highest frequency at 760 trillion hertz and carries the highest energy. ULTRAVIOLET: Found just above visible ...
33-6 Radiation Pressure
... we view the plane of oscillation head-on and indicate the directions of the oscillating electric field with a double arrow. The plane containing E vectors is plane of oscillation of the wave plane-polarized in the y direction In Fig. 33-9b indicates the wave's polarization as the wave trave ...
... we view the plane of oscillation head-on and indicate the directions of the oscillating electric field with a double arrow. The plane containing E vectors is plane of oscillation of the wave plane-polarized in the y direction In Fig. 33-9b indicates the wave's polarization as the wave trave ...
6 I – Rocket Science
... It was around 50 years after J.C.Maxwell’s ideas, that a young scientist made a remarkable discovery: He found that one cannot put arbitrarily little energy into an electromagnetic wave. Usually, the energy which is carried by it is determined by two factors: one is its wavelength, and the other one ...
... It was around 50 years after J.C.Maxwell’s ideas, that a young scientist made a remarkable discovery: He found that one cannot put arbitrarily little energy into an electromagnetic wave. Usually, the energy which is carried by it is determined by two factors: one is its wavelength, and the other one ...
Electromagnetic Waves come in many varieties, including radio
... Electromagnetic Theory Electromagnetic Waves come in many varieties, including radio waves, from the ‘long-wave’ band through VHF, UHF and beyond; microwaves; infrared, visible and ultraviolet light; X-rays, gamma rays etc. About 1860, James Clerk Maxwell brought together all the known laws of elect ...
... Electromagnetic Theory Electromagnetic Waves come in many varieties, including radio waves, from the ‘long-wave’ band through VHF, UHF and beyond; microwaves; infrared, visible and ultraviolet light; X-rays, gamma rays etc. About 1860, James Clerk Maxwell brought together all the known laws of elect ...
Phys2102 Spring 2002
... Radio waves are reflected by the layer of the Earth’s atmosphere called the ionosphere. This allows for transmission between two points which are far from each other on the globe, despite the curvature of the earth. Marconi’s experiment discovered the ionosphere! Experts thought he was crazy and thi ...
... Radio waves are reflected by the layer of the Earth’s atmosphere called the ionosphere. This allows for transmission between two points which are far from each other on the globe, despite the curvature of the earth. Marconi’s experiment discovered the ionosphere! Experts thought he was crazy and thi ...
Transverse Electromagnetic Waves in Free Space
... field (Faraday´s law) and vice-versa (modified Ampere´s Law). ...
... field (Faraday´s law) and vice-versa (modified Ampere´s Law). ...
Chapter8 Electromagnetic waves Question bank LEVEL –A 1) State
... 1) Draw the diagram of electromagnetic plane polarized electromagnetic wave travelling in the forward direction and mark the directions of electric and magnetic field vectors and also the direction of propagation of the wave.(3) 2) What is the relation between the magnitudes of electric field and ma ...
... 1) Draw the diagram of electromagnetic plane polarized electromagnetic wave travelling in the forward direction and mark the directions of electric and magnetic field vectors and also the direction of propagation of the wave.(3) 2) What is the relation between the magnitudes of electric field and ma ...
EMlecture203
... changing electric field produces a magnetic field, changing magnetic field produces an electric field, once sinusoidal fields are created they can propagate on their own. These propagating fields are called electromagnetic waves. ...
... changing electric field produces a magnetic field, changing magnetic field produces an electric field, once sinusoidal fields are created they can propagate on their own. These propagating fields are called electromagnetic waves. ...
Intro to EMR and Wave Equation
... (this was difficult to detect because the magnetic fields produced by changing electric fields are very weak) ...
... (this was difficult to detect because the magnetic fields produced by changing electric fields are very weak) ...
File
... The linking of these two forces (electric and magnetic) allowed physicists to move closer to the ultimate goal of linking all the forces into a Grand Unified Theory (G.U.T.) The nuclear forces (weak and strong) are explained by an interaction of EM waves Gravity is the elusive force that has not bee ...
... The linking of these two forces (electric and magnetic) allowed physicists to move closer to the ultimate goal of linking all the forces into a Grand Unified Theory (G.U.T.) The nuclear forces (weak and strong) are explained by an interaction of EM waves Gravity is the elusive force that has not bee ...
UNIVERSITY OF LEIPZIG
... show that the source f (x0 , t0 ) = δ(x0 ) δ(y 0 ) δ(t0 ), equivalent to a t = 0 point source at the origin in two spatial dimensions, produces a two-dimensional wave, 2c Θ(ct − ρ) Ψ(x, y, t) = √ 2 2 c t − ρ2 where ρ2 = x2 + y 2 and Θ(ξ) is the unit step function [Θ(ξ) = 0(1) if ξ < (>)0]. 26. A tra ...
... show that the source f (x0 , t0 ) = δ(x0 ) δ(y 0 ) δ(t0 ), equivalent to a t = 0 point source at the origin in two spatial dimensions, produces a two-dimensional wave, 2c Θ(ct − ρ) Ψ(x, y, t) = √ 2 2 c t − ρ2 where ρ2 = x2 + y 2 and Θ(ξ) is the unit step function [Θ(ξ) = 0(1) if ξ < (>)0]. 26. A tra ...
Notes
... All EM waves follow the relation v = f λ and since v = the speed of light = c, we have c = f λ. Visible light has λ = 400 to 750nm. The full range of frequencies for EM waves constitutes the EM spectrum. It is difficult to measure a speed as great as 3 x 108 m/s. Michelson made accurate measurement ...
... All EM waves follow the relation v = f λ and since v = the speed of light = c, we have c = f λ. Visible light has λ = 400 to 750nm. The full range of frequencies for EM waves constitutes the EM spectrum. It is difficult to measure a speed as great as 3 x 108 m/s. Michelson made accurate measurement ...
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.