processes available 5. Explain Trunking and Grade Of Service. 6. Compare Between FDMA‚ TDMA‚ CDMA‚ SDMA. 9. Explain the operations of CDMA WIRELESS PROPAGATION CHANNELS EL system? 2. What is scattering? EC 24 3. What is diffraction? 4. Mention any four Indoor propagation models 5. Define Brewster angle? 6. Calculate the Brewster angle for a wave impinging on ground having a permittivity εr = 2. 7. List out any three small-scale fading effects of multipath in the radio
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Shanghai‚ and his research group have proposed a concept of what physicists refer to as the capture-acceleration scenario to show that an electron can be accelerated by a tightly focused laser in a vacuum. In the capture-acceleration scenario‚ the diffraction from a tightly focused laser changes not only the intensity distribution of the laser but also its phase distribution‚ which results in the field phase velocity being lower than the speed of light in a vacuum in some areas. Thus‚ a channel that
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motivated him to study and earn numerous degrees from Harvard‚ MIT and the University of Chicago. He then became a full-time professor of optical physics at Johns Hopkins University He wrote many articles on spectroscopy‚ phosphorescence and diffraction. He is best known for his work in ultra-violet light. Wood has been described as the "father of both infrared and ultraviolet photography" because of the discovery of electromagnetic radiation beyond the visible spectrum and the development
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Waves are mainly known for their way of transferring energy from one place to another without transferring any matter.Transverse and longitudinal are waves in which can be related to one another in some kind of way. A transverse wave is a wave in which vibrates perpendicular to the direction of the waves motion. As a transverse wave travels through a medium‚ the individual particles of the medium move perpendicular to the direction of the wave travel. They may occur in a string‚ in the surface of
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Wireless energy transfer or wireless power is the transmission of electrical energy from a power source to an electrical load without artificial interconnecting conductors. Wireless transmission is useful in cases where interconnecting wires are inconvenient‚ hazardous‚ or impossible. The most common form of wireless power transmission is carried out using direct induction followed by resonant magnetic induction. Other methods under consideration include electromagnetic radiation in the form of microwaves or lasers
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Objective The objective of this experiment was to find the focal length of two converging lenses separately and also to find the focal length of combination of two converging lenses. Another objective was to study the image formed by a converging lens plus diverging lens. Background This experiment focused on a simple lens system. A simple lens is a piece of glassware that is spherical on one side and flat on another side‚ or spherical on both sides. There are two different types of lenses
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Introduction to Spectroscopic Methods • Spectroscopy: general term for the science that deals with interaction of various types of radiation with matter 1.Atomic Spectroscopy 2.Molecular spectroscopy • Important to understand the interaction between the electromagnetic radiation and the matter (mainly)‚ + interaction of a acoustic waves and beam of particles (ions‚ electrons) with matter. • Wave model failed to account for absorption and emission of EM energy – (sinosoidal wave model (λ
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One Hundred and Fifty Questions 1. What two entities comprise a vector?-a vector is comprised of direction and magnitude. 2. What do you do with any vector that is not on either the x or y axis?-break it up into x and y components using trig‚ add up the components. 3. How are velocity and speed different?-velocity has a direction while speed does not. 4. What is the slope of the distance time graph? - Delta d/delta t. or distance over time. Rise over run. 5. What is
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HOLOGRAPHIC MEMORY By Talluri Mahesh‚ BL.EN.U4MEE10061. ABSTRACT: Devices that use light to store and read data have been the backbone of data storage for nearly two decades. Compact discs revolutionized data Storage in the early 1980s‚ allowing multi-megabytes of data to be stored on a disc that has a diameter
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Drion Shkreli Alchemy to Astrophysics Professor Efthimiades 12/11/2012 Quantum Mechanics Homework 1. Principles of Quantum Mechanics a. Particles have multiple virtual motions and each motion is accompanied by a wave. The strength of the total particle wave at each point corresponds to the probability that the particle may be found there. Applying this principle we can explain all kinds of phenomena‚ from the properties of atoms and radioactivity to light reflection. 2. Electron Double
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