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Kinnari Sorathia

on 10 May 2013

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Transcript of Telescopes

By: Kinnari and Danny Telescopes Range in Electromagnetic Spectrum Combination of Visible Light Wave Characteristics Reflection Transmission Refraction Diffraction A range of different frequencies/wavelengths in which electromagnetic waves emit, from longest wavelength and lowest frequency to the smallest wavelength and highest frequency. When it hits a lens, it refracts the light into different wave lengths, which show color to the human eye. It depends on how reflective and durable the mirrors inside the telescope are, on how clearly the telescope an transmit. Telescopes can reflect light in order for an image to be viewed in a different direction. The eye piece doesn't have to be directly behind the lens. This is what happens when light passes through a different medium and is bent. Light is bent away from perpendicular if the medium is less dense than light; it is bent towards perpendicular if the medium is more dense than light. Diffraction is when waves bend around an object. The amount of bending depends on how big the the wave length is and how big the opening is. Scattering Flat Mirrors Concave Mirrors Convex Mirrors Concave Lens Convex Lens Diffraction Patterns Picture taken by Hubble Space Telescope, which is near diffraction limited. {http://www.poptechjam.com/2013/04/} At constant velocity, the shorter the wavelength, the higher the frequency. Spitzer Telescope It uses a lightweight reflector with a mirror as its lens to refract white light into ranges of the color spectrum. Image taken by Chandra Xray Telescope, which uses a high frequency wave to capture it White light is the presence of all wave lengths. https://en.wikipedia.org/wiki/The_Dark_Side_of_the_Moon http://amazing-space.stsci.edu/resources/explorations/groundup/lesson/scopes/spitzer/ https://upload.wikimedia.org/wikipedia/commons/e/e2/William_herschel_Telescope_Dome.jpg The Herschel Telescope uses optical or a near-infrared single optical lens to transmit what it sees. http://www.dailygalaxy.com/.a/6a00d8341bf7f
37&ndsp=21&tx=157&ty=101 Snell's Law The law states that the ratio of the angles is equal to the ratio of the velocities of the mediums. n is another was to show the opposites of refraction. "The Great Refractor" in Cambridge uses an achromatic lens to display images rather than mirrors. http://www.cfa.harvard.edu/hco/grref.html Law of Reflection It allows people to predict where light will be reflected. The angle of incident is the angle coming in to the reflection. The mirror becomes the normal and the ray of reflection creates the angle or reflection as well. When light hits a medium and is diffused. http://en.wikipedia.org/wiki/Compton_Gamma_Ray_Observatory The Compton Telescope uses the concept of scattering. Flat mirrors use the Law of Reflection to reflect images from a telescope. Parkes radio telescope near Sidney, Australia. http://en.wikipedia.org/wiki/File:Parkes.arp.750pix.jpg South Pole telescope: Microwave radiation. The prism sheet uses combination of white light to create a rainbow of colors. The wave tank shows how waves look and travel. The wave tank shows how the waves move through the object. The blocks transmitted the lazer onto the wall. commons.wikimedia.org The Multiple Mirror Telescope uses flat mirrors to reflect images. mmto.org jwilson.coe.uga.edu www.science20.com Concave mirrors are used to focus light to one focal point inside the telescope. The Gregorian Telescope uses a concave mirror to focus light. http://en.wikipedia.org/wiki/File:Gregorian_telescope_circa_1735_in_Putnam_Gallery_2,_2009-11-24.jpg Concave mirrors reflect light to form images. The convertible Newtonian/Cassegrain reflecting telescope uses convex mirrors. http://en.wikipedia.org/wiki/Reflecting_telescope http://en.wikipedia.org/wiki/Reflecting_telescope Concave lenses are used to bring more light into the telescope Hubble Space Telescope: Near IR technology http://www.nasa.gov/images/content/744235main_hubblefloating.jpg USA harlan j smith visible light telescope http://en.wikipedia.org/wiki/File:USA_harlan_j_smith_telescope_TX.jpg Swift Gamma Ray Burst Explorer: Various forms of light including UV http://ecuip.lib.uchicago.edu/multiwavelength-astronomy/images/gamma-ray/tools/main_swift-burst_m.jpg http://upload.wikimedia.org/wikipedia/commons/9/96/Chandra_X-ray_Observatory.jpg Chandra Observatory: Xray Fermi Gamma-ray Space Telescope http://fermi.sonoma.edu/multimedia/gallery/GLASTinSpaceWeb.jpg Focuses the light. Its the main use for optical telescopes. Refracting telescope from "Nice Observatory" That uses a convex lense to focus a large image to one point which the naked eye sees through http://en.wikipedia.org/wiki/File:Telescope.jpg When a wave encounters an obstacle, the pattern or "ripple" of the wave changes, depending on the obstacle shape/size. The mirrors reflect the lazer. The laser is being refracted through the medium. Flat mirrors were used to reflect the light. The lasers were used to show how a concave mirror works. Lasers were used to show how a convex mirror reflect light. The concave lens
scattered the light. The piece calcite scattered the laser. Newton's reflecting telescope uses reflection to create images. Herschel Space observatory: Far IR Technology http://en.wikipedia.org/wiki/Reflecting_telescope http://en.wikipedia.org/wiki/File:Herschel_Space_Observatory.jpg
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