PPT-Electromagnetic Waves and Polarization

Physics 2415 Lecture 30 Michael Fowler UVa Todays Topics Measuring the speed of light Wave energy and power the Poynting vector Light momentum and radiation pressure Radio transmission. Section . 1- What . are electromagnetic waves?. WHAT DO CORDLESS PHONES AND MICROWAVE OVENS HAVE IN COMMON?. Each emits electromagnetic waves.. Remember…. A . wave. . is a repeating disturbance or movement that transfers energy through matter or space.. 8. th. Grade Physical Science . Question: . What type of wave is a sound wave? . Waves. 3/10/15. Wave. —a repeating movement or disturbance that transfers energy through matter or space. . All waves carry energy without transporting matter from place to place. . Outline. Review of the Quasi-static Approximation. Electric and Magnetic Components of Waves. The Wave Equation (in 1-D). Uniform Plane Waves. Phase Velocity and Intrinsic Impedance. Wave-vector and Wave-frequency. Light:. Temperature, Scattering & Absorption. Essential Standards. 6.P.. 3 Understand . characteristics . of energy . transfer and interactions of matter and energy.. Clarifying Objectives. 6.P .. Physics 4. Prepared by Vince Zaccone. For Campus Learning Assistance Services at UCSB. Maxwell’s Equations. Prepared by Vince Zaccone. For Campus Learning Assistance Services at UCSB. Maxwell’s equations summarize the relationships between electric and magnetic fields. A major consequence of these equations is that an accelerating charge will produce electromagnetic radiation.. Wave 3 continue. Polarization. Polarization is a process of turning . unpolarized. light to polarized light. A light wave is an electromagnetic wave that travels through the vacuum of outer space. Light waves are produced by vibrating electric charges.. the Electromagnetic Spectrum. Waves. All waves carry … ENERGY!!!. Electromagnetic Waves (light) . Light waves are . transverse. waves. Electromagnetic. Radiation. Energy emitted from the . Sound. Sound waves are compressional waves.. Two regions: compressions and rarefactions. Sound travels faster in liquids and solids than in gases.. Why? The molecules in liquids and solids are closer together.. Light:. Temperature, Scattering & Absorption. Essential Standards. 6.P.. 3 Understand . characteristics . of energy . transfer and interactions of matter and energy.. Clarifying Objectives. 6.P .. 1. The Electromagnetic Spectrum. Wavelength/frequency/energy. MAP TAP 2003-2004. The Electromagnetic Spectrum. 2. Teacher Page. Content: Physical Science—The Electromagnetic Spectrum. Grade Level: High School. Electromagnetic Waves. Electromagnetic (EM) waves . are waves caused by oscillations occurring simultaneously in electric and magnetic fields. A . 2D. transverse. wave. They DO NOT require any medium in order to propagate. Light. Light. Properties and Interactions. What is Light?. Light. is a form of energy emitted by the Sun..  . What is Light?. Light. is a type of energy that travels as an electromagnetic wave.. Light, microwave, x-ray, TV, and cell phone transmission are all kinds of . electromagnetic waves. .. Electromagnetic waves are a group of energy waves that are mostly invisible and can travel through empty space.. Energy is moving, not water. orbital motion. energy is transferred via circular motions. water (and gull) return to original position. the wave form moves forward. Motion decreases with depth. At. a depth of ½ of the wavelength, the motion is not significant..