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Making a simple reflecting telescope
A simple reflecting telescope can be made from a concave mirror obtained from a shaving mirror. The mirror is arranged wooden box of suitable size in such a way that it can be tilted at dissimilar angles. An upright made of wood is attached to the box so that its angle may also be varied. Two short focus lenses are fixed in corks which are then placed in a short length of mailing tube as an eye-piece. Then join this eye- piece attached to the wood upright exactly at the focal
what are the subdivisions of ecology
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explain the factors that led to the decline of science in europe during iron age
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Preparation of Guidance Charts for First Aid Your Counsellor will form groups of four students. Using the materials from the sections of Unit 16 mentioned in each case below, each
How old is the earth Ans) The earth has only very freshly been accurately dated. Until astonishingly recently, the earth was thought to be anywhere among a few hundred thousand
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Explain General Structural Plan of the Gastrointestinal Tract The wall of the gastrointestinal tract consists of four layers of tissue. These are: Adventitia or outer co
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