range. A lens antenna consists of a lens proper and of a feed. The shape of the lens depends on the refractive index n (the ratio of the phase velocity of propagation of a radio wave in a vacuum to that in the lens). A decelerating lens antenna‚ as in optics‚ is one for which n > 1. An accelerating lens antenna (without an optical analogy) is one for which n < 1. The feed is usually a horn antenna that generates a spherical wave front or an antenna array that produces a cylindrical wave front.
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Building Physics Laboratory building case study showcases the refurbishment of the southern façade with the Anidolic Ceiling system‚ achieving higher luminance and illuminance factors. The Anidolic Blinds are a façade system where the non-imaging optics prevent high solar rays but allow lower altitude diffuse light into the room. Solar Tubes or “Tubular Daylighting Devices‚” an alternative means of redirecting daylight into a space‚ where it uses some of the same principles as the Anidolic daylighting
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Introduction to Electron Microscopy Prof. David Muller‚ dm24@cornell.edu Rm 274 Clark Hall‚ 255-4065 Ernst Ruska and Max Knoll built the first electron microscope in 1931 (Nobel Prize to Ruska in 1986) T4 Bacteriophage Electron Microscopy bridges the 1 nm – 1 μm gap David Muller 2008 between x-ray diffraction and optical microscopy Tools of the Trade AFM MFM Scanned Probe Microscope (includes Atomic Force Microscope) Transmission Electron Microscope Scanning Electron
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different isotropic media‚ such as water and glass. • It’s also commonly known as ’’The Law Of Refraction’’ What is light : How is light propagated through different optic medium? • Light is the natural agent that stimulates sight and makes things visible; electromagnetic radiation from about 390 to 740 nm in wavelength. • In optics‚ Snel’s Law is used to calculate the path of waves to compute the angles of incidence and refraction. • The law is also used in metamaterials‚ which allows light
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Name of Student: Name of Partner: Date of Experiment: Date of Report: Aim In this experiment‚ we aim to: (a) determine the refractive index n of a polymer slab from its constructive and destructive thin-film microwave interference; and (b) determine the lattice constant a of an array of thin copper rods from its Bragg diffraction of the incident microwave. Introduction Thin Film Interference When plane electromagnetic wave of wavelength λ is incident on a dielectric surface‚ part
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Newtonian reflecting telescope Aim: To recreate Newton’s experiment in building a reflecting telescope‚ aiming to further the field of optics. We hope to use the theory studied in this experiment and produce a working Newtonian telescope (that Newton designed). He wanted to create a telescope that was not affected by chromatic aberration and thus further the field of optics. We also aim to try to remove the problem of spherical aberration that Newton had trouble with in building his telescope. Introduction:
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To find Refractive Indices of Water And Turpentine Oil using a plane mirror‚ a equiconvex lens (made from a glass of known refractive index) and an adjustable object needle APPARATUS: A convex lens‚ an optical needle‚ a plane mirror‚ a clamp stand‚ a spherometer‚ a plumb line‚ metre scale‚ water and turpentine oil Theroy : Let’s add small amount of water on a flat‚ plane surface and place a convex lens over it. This forms a plano-concave lens of water between the lower surface of convex lens and
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type are parabolic reflectors‚ found in optical devices such as reflecting telescopes that need to image distant objects‚ since spherical mirror systems‚ like spherical lenses‚ suffer from spherical aberration. One advantage that mirror optics have over lens optics is that mirrors do not introduce chromatic aberration. * | Convex mirrors A convex mirror diagram showing the focus‚ focal length‚ centre of curvature‚ principal axis‚ etc. A convex mirror‚ fish eye mirror or diverging mirror‚ is
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Pin hole camera was invented by a Muslim scientist ibn-al-haitham.An Egyptian polymath (born in Iraq) whose research in geometry and optics was influential into the 17th century; established experiments as the norm of proof in physics (died in 1040). Another inventor is the tenth century optician and physicist Abu Ali al-Hassan ibn al-Hassan ibn al-Haytham‚ simply known as al-Haytham‚ who invented the pinhole camera and discovered how the eye works. The ancient Greeks thought our eyes emitted
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current screen displays which have lack of space. Study Plan I would be like to take these courses Optical electronics‚ Nanophotonics‚ Optoelectronic semiconductor devices and their applications‚ Optical Communication‚ Optical networks & Nonlinear Fiber-Optics. In first phase i will do literature survey of Holography 3D Displays‚ in second phase i will do experiments and in third phase i will do the tests. Future Play After Study After doing M.S i would like to get a job of R&D in Industry to gain industry
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