AT622 Section 1 Electromagnetic Radiation
... where < E2 > = E02/2. It also follows that I = d < S > / dΩ. Example 1.2: Consider the following problem: a plane, sinusoidal, linearly polarized electromagnetic wave of wavelength λ = 5.0 x 10-7 μm travels in a vacuum along the x axis. The average flux of the wave per unit area is 0.1 Wm-2 and the ...
... where < E2 > = E02/2. It also follows that I = d < S > / dΩ. Example 1.2: Consider the following problem: a plane, sinusoidal, linearly polarized electromagnetic wave of wavelength λ = 5.0 x 10-7 μm travels in a vacuum along the x axis. The average flux of the wave per unit area is 0.1 Wm-2 and the ...
Faraday`s Law
... X (a) Electromagnetic waves are longitudinal waves. (b) Electromagnetic waves transfer energy through space. (c) The existence of electromagnetic waves was predicted by Maxwell. ...
... X (a) Electromagnetic waves are longitudinal waves. (b) Electromagnetic waves transfer energy through space. (c) The existence of electromagnetic waves was predicted by Maxwell. ...
PPT
... 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. ...
EE 333 Electricity and Magnetism
... 2. Physical intuitive understanding for electromagnetic theory. 3. Intimate understanding of Maxwell’s equations. 4. Ability to use differential vector mathematics to solve electromagnetic problems. 5. Knowledge of analytical and numerical techniques for solving static and time-dependent problems in ...
... 2. Physical intuitive understanding for electromagnetic theory. 3. Intimate understanding of Maxwell’s equations. 4. Ability to use differential vector mathematics to solve electromagnetic problems. 5. Knowledge of analytical and numerical techniques for solving static and time-dependent problems in ...
Electromagnetic Theory, Photons and Light • Introduction – Maxwell
... ∗ Imagine a very dim source, surrounded at equal distances, by indentical photodetectors capable of measuring a minute amount of light. ∗ If the emission, no matter how faint, is a continuous wave, all the detectors should register each emitted pulse in coincidence. ∗ This does not happen - counts a ...
... ∗ Imagine a very dim source, surrounded at equal distances, by indentical photodetectors capable of measuring a minute amount of light. ∗ If the emission, no matter how faint, is a continuous wave, all the detectors should register each emitted pulse in coincidence. ∗ This does not happen - counts a ...
The nature of electromagnetic radiation. 1. Basic introduction to
... NOTE: Scattering can be thought of as absorption of radiant energy followed by reemission back to the electromagnetic field with negligible conversion of energy. Thus, scattering can remove radiant energy of a light beam traveling in one direction, but can be a “source” of radiant energy for the lig ...
... NOTE: Scattering can be thought of as absorption of radiant energy followed by reemission back to the electromagnetic field with negligible conversion of energy. Thus, scattering can remove radiant energy of a light beam traveling in one direction, but can be a “source” of radiant energy for the lig ...
Chapter 2 The Properties of Electromagnetic Radiation
... Stationary electric charges produce electric fields, whereas moving electric charges produce both electric and magnetic fields. Regularly repeating changes in these fields produce what we call electromagnetic radiation. Electromagnetic radiation transports energy from point to point. This radiation ...
... Stationary electric charges produce electric fields, whereas moving electric charges produce both electric and magnetic fields. Regularly repeating changes in these fields produce what we call electromagnetic radiation. Electromagnetic radiation transports energy from point to point. This radiation ...
Chapter 7 The Quantum- Mechanical Model of the
... Louis de Broglie (1892–1987) • De Broglie proposed that particles could have wavelike character. • De Broglie predicted that the wavelength of a particle was inversely proportional to its momentum. • Because it is so small, the wave character of electrons is significant. ...
... Louis de Broglie (1892–1987) • De Broglie proposed that particles could have wavelike character. • De Broglie predicted that the wavelength of a particle was inversely proportional to its momentum. • Because it is so small, the wave character of electrons is significant. ...
PYP001-122-Final Exam Solution [Choice A is the correct
... A) Electromagnetic waves with longer wavelength carry less energy. B) The total energy of an object at rest must be zero. C) Nerves use radiant energy to communicate with the body. D) Electromagnetic waves are compressional waves. E) Useful energy is always equal to wasted energy. Q15. Which of the ...
... A) Electromagnetic waves with longer wavelength carry less energy. B) The total energy of an object at rest must be zero. C) Nerves use radiant energy to communicate with the body. D) Electromagnetic waves are compressional waves. E) Useful energy is always equal to wasted energy. Q15. Which of the ...
radioactivity: types of radiation
... radiation, it is said to have “decayed”. 4He Since222 the nucleus this atom is now Rn + of 86 from the original, ...
... radiation, it is said to have “decayed”. 4He Since222 the nucleus this atom is now Rn + of 86 from the original, ...
EMT MODEL SET 2
... Part-A (Answer all the questions) 1. Give the applications of Divergence of a vector. 2. Give the effect of electromagnetic fields on human beings. 3. What is Dielectric Strength? 4. Plot the electric field and equipotential surfaces in a parallel plate capacitor. 5. What is magnetization? 6. What a ...
... Part-A (Answer all the questions) 1. Give the applications of Divergence of a vector. 2. Give the effect of electromagnetic fields on human beings. 3. What is Dielectric Strength? 4. Plot the electric field and equipotential surfaces in a parallel plate capacitor. 5. What is magnetization? 6. What a ...
Basic Principles of Microwave Energy
... through the wire is now made to oscillate Figure 2-3 Electromagnetic field around a conductor (or alternate the direction of its flow) very (Wagner/Gallawa) rapidly, the floating electromagnetic field will break free from the conductor and be launched into space. Then, at the speed of light, the ene ...
... through the wire is now made to oscillate Figure 2-3 Electromagnetic field around a conductor (or alternate the direction of its flow) very (Wagner/Gallawa) rapidly, the floating electromagnetic field will break free from the conductor and be launched into space. Then, at the speed of light, the ene ...
Physics Lecture #34 - WordPress for academic sites @evergreen
... a) The current in the loop is clockwise and constant. What is the direction of the magnetic field at P? The current in the loop now alternates (CW, then CCW, then CW, etc.) b) What is the direction of the EM wave at the indicated point? c) What is the polarization direction of the magnetic field por ...
... a) The current in the loop is clockwise and constant. What is the direction of the magnetic field at P? The current in the loop now alternates (CW, then CCW, then CW, etc.) b) What is the direction of the EM wave at the indicated point? c) What is the polarization direction of the magnetic field por ...
Lecture 2: Properties of Radiation - Department of Meteorology and
... - A changing magnetic field produces an electric field (this is the phenomenon of electromagnetic induction, the basis of operation for electrical generators, induction motors, and transformers). - Similarly, a changing electric field generates a magnetic field. - Because of this interdependence of ...
... - A changing magnetic field produces an electric field (this is the phenomenon of electromagnetic induction, the basis of operation for electrical generators, induction motors, and transformers). - Similarly, a changing electric field generates a magnetic field. - Because of this interdependence of ...
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.