Optical instruments are devices which use light rays for one of two purposes. Telescopes are of two types: 1. Physics Project Report on Frictional Electricity. What You Need: Two lenses with different focal lengths (We recommend 150 mm and 500 mm double convex lenses.) Telescope Lesson Plan . This is possible only when you have the best CBSE Class 12 Physics study material and a smart preparation plan. Also, learn about alpha decay and the uses of radioactivity in detail. … Leah Telescopes What is a refracting telescope? fe = Focal length of the eye-piece lens. LOOK BOOK. medium-sized telescope with a light-collecting mirror 30 centimeters in diameter, you can see hundreds of thousands of stars. Free PDF download of Class 12 Physics revision notes & short key-notes for Chapter 9 - Ray Optics and Optical Instruments to score high marks in exams, prepared by expert Physics teachers from latest edition of CBSE(NCERT) books. Galilean telescope or Terrestrial telescope. Telescopes are of two types: 2. A telescope is an optical instrument using lenses, curved mirrors, or a combination of both to observe distant objects, or various devices used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation. 0000011101 00000 n 126 27 0000001967 00000 n For an SCT or other compound telescope it is generally the diameter of the front optical element. Editor's note: Contributor Nola Taylor Redd enlisted her children — Dawn (12), Michael (10), Jimmy (8), and Candy (6) — for this project. 2. CBSE Class 12 Physics Chapter 10 Wave Optics notes in PDF are available for free download in myCBSEguide mobile app. Physics Project File On Transformer - A device which works on the Principle of Mutual Induction . The first known practical telescopes were refracting telescopes invented in the Netherlands at the beginning of the 17th century, by using glass lenses. And the length (L) of the tube of the telescope is equal to the sum of the focal lengths of the objective lens and the eyepiece. He has completed his work successfully during the session 2012-13. Aim To understand the construction and working of an astronomical telescope using convex lenses of suitable focal lengths. <]>> Theory and working 1. -The combination of lenses to form and image. In this chapter, the phenomena of reflection, refraction and dispersion of light, using the ray picture of light is considered. Microscope & Telescope Fundamentals Optical Engineering Prof. Elias N. Glytsis . Let us see their function, how they can bring a thing near to us. Astronomical telescope 2. An astronomical telescope is an optical instrument which is used to see the magnified image of distant heavenly bodies like stars, planets, satellites and galaxies etc. 0000000836 00000 n School of Electrical & Computer Engineering . An astronomical telescope consists of two convex lenses: an objective lens O and an eyepiece E. the focal length fo of the objective lens of a solar telescope is large as compared to the focal length few of the eyepiece. But the most significant step cited in the invention of the telescope was the dev… 1 large poster of the current project for display (e.g. Photometry is a branch measurement of light energy. Making a project is a compulsory part for the 12 as the marks will be addon with your result. Chemistry Projects Biology Projects Physics Projects project of international cooperation between ESA and NASA. Shares. If you are a class 12 student and looking for physics investigatory projects, do not miss CoolJunk DIY(do-it-yourself) physics kits: CoolJunk Physics Investigatory Project Kits Using step-by-step visual instructions & detailed theory manual, you can make your physics investigatory project within hours & score 100% marks in practical. How to Build a Telescope | Science Fair Projects. 0000000016 00000 n The eyepiece is so adjusted that A’B’ lies just at the focus of the eyepiece. which produces the Sources of light are of three types-thermal sources and luminescent sources. A telescope is an optical instrument which is used to see the distant objects. * Space Based Atronomy.b/w 2/28/01 8:54 AM Page 1 Characteristics of Light Light waves are electromagnetic waves, whose nature is transverse. When the final image of an object is formed at infinity, the telescope is said to be in ‘normal adjustment’. Related media on Wikimedia Commons [edit on Wikidata] The Cosmology Large Angular Scale Surveyor (CLASS) is an array of microwave telescopes at a high-altitude site in the Atacama Desert of Chile as part of the … An astronomical telescope is an optical instrument which is used to see the magnified image of distant heavenly bodies like stars, planets, satellites and galaxies etc. Magnifying Power of an astronomical telescope is normal adjustment is defined as the ratio of the angle subtended on the eye by the final image of the angle subtended on the eye, by the object directly when the final image and the object both lie at infinite distance from the eye. The final image formed by an astronomical telescope is always virtual, inverted and magnified. 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