Experiment 9: THE TANGENT GALVANOMETER; PURPOSE: In this experiment we will measure the magnitude of the horizontal component of the Earth’s Magnetic field by the use of an instrument called a tangent galvanometer. INTRODUCTION: A tangent galvanometer consists of a number of turns of copper wire wound on a hoop. At the center of the hoop a compass is mounted. When a direct current flows through the wires‚ a magnetic field is induced in the space surrounding the loops of
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his telescope as a concave telescope‚ because it has a lens with inward curving surfaces. Till 1611 Johannes Kepler switched the concave eyepiece to a convex eyepiece. This allowed the telescope to gain a much larger range of distance. (http://www.antiquetelescopes.org/history.html)It also allowed the projection of images on to a flat white screen. The only problem was that the images were upside down‚ Johannes Kepler added a third convex lens to make the images the right side way. Even though
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|Compound Microscope Parts | |[pic] | |A high power or compound microscope achieves higher levels of magnification than a stereo or low power microscope. It is used to view smaller | |specimens such as cell structures which cannot be seen at lower
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(refracting) called the “looker” by aligning a concave and a convex lens inside a metal tube. The convex lens refracted light to a specific point on the concave eyepiece making distant objects look magnified. When Galileo heard about the ’looker’‚ he decided to improveupon its design. Galileo called his model the ’telescope’. In his first attempt‚ Galileo built a three-power instrument containing a convex and a concave lens in 1609. He was more successful in further attempts to magnify objects
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brain‚ let us see the world. Sensors in the skin respond to touch and allows us to feel. * * * * The seeing eye… Light enters the eye through the clear cornea. It then passes through the pupil and is focused by the lens on the retina. This thin layer covers the back of the eye and contains cells that are sensitive to light. When light hits the cells‚ they send signals to the brain. There‚ the signals are turned into pictures so we can see. Telescope
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INTRODUCTION Defects of Hearing •Hearing defects means ear is not working correctly or as well as it should. •It may occur in more than one part of the ear. •1. DEAF-full or partial decrease in the ability to detect or understand sounds. Deaf usually caused by : - Eardrum is torn-cannot function - Ossicle bone fused together-can’t vibrate - Auditory nerve damaged by loud sound - Cochlea damage due to sickness/ drugs •2. Temporary hearing loss-build-up of earwax •3. Presbycusis- hearing loss
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measuring the human visual system in relation to diagnosticprocedures and optical correction.In a series of three articles‚ John will give us the backgrounds we need to understand the basis of wave front technology. A technology many in the contact lens industry believe will cause a dramatic change in the coming years. The editors of Global CONTACT are happy to offer a series of basic articles on this subject which will be very informative. happens if we apply such lenses to the human visual system
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Name _______________________________ /15 marks Three questions will be selected at random and graded. Each question will be valued at 5 marks in which it will be graded based on: a) Content contained in the answer b) Answering in a logical manner in complete sentences using proper grammar and spelling. c) If the answer requires a mathematical calculation‚ the use of proper mathematical format‚ showing numerical
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Northern Caribbean University Department of Biology‚ Chemistry and Environmental Sciences **** BIOL 165: ANATOMY & PHYSIOLOGY1 Laboratory Manual 2013-2014 http://www.udel.edu/biology/Wags/histopage/colorpage/cin/cin.htm To be used in Anatomy & Physiology-BIOL 165 & 166 labs only Not to be used as a source of reference Not to be sold or distributed outside of the classroom Lecturers: Nadia Washington‚ MSc. Delano Lewis‚ PhD. Disclaimer
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that was useful in helping me determine the order was 400x. This magnification allowed me to see that the yellow color thread was on the bottom and that the green color thread was in the middle. The optical principles that are in play here are perfect lens characteristic and transmitted light microscopy optical pathways. Interpupillary distance is the distance between the centers of the pupils of the two eyes. The way to determine what the interpupillary distance is with a device
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