Stero microscope low power instrument used in visualizing large objects at low magnification (5-50X); produces unreversed‚ right side up‚ 3-d image; unlike the compound microscope. 1. Prepare slide 2. Turn on transformer 3. Use lowest power lens 4. One eye closed‚ find and focus the object sharply 5. Close eye open the other 6. Keep both eyes open when viewing object Compound microscope Magnifies to about 1000 times with some modification‚ can be increase 2-3 times (but that’s about
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microscope focuses light on a tiny bright spot of the specimen‚ the microscope accumulates light from the well-illuminated specimen in the stage of the microscope. The small objective lens then brings the image of the object into focus within the microscope’s tube‚ and is then magnified by a second lens‚ called an ocular lens or the eyepiece. The specimen in an optical microscope can be rather thick. In contrast‚ unlike the light microscope‚ the electron microscope visualises objects using a thin beam
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parts: Data part 2 After turning the light on‚ what two components allow one to adjust the light intensity of the microscope? Rheostat and the iris What structure holds the slide in place on the stage of the microscope? Spring load clip Which lens is in the light path? 4 x Of the stage adjustment knobs‚ the larger knob / Y-adjustment (on the top) moves the slide in which direction? In which direction does the smaller / X-adjustment knob (on the bottom) move the slide? The top y moves
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convex lens‚ by using the lens equation: 1/f=1/u+1/v * Independent variables: * Screen * lens * Dependent variables: * distance between the source of light and the lens “V” which is “X” value * distance between lens and the screen “ Y value” * Controlled variables: * ruler * screen size * source of light * Hypothesis: When the lens is displaced further away from the light “image” source the focal point is going to get smaller‚ and when the lens is approached
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person do not help the society to develop but rather takes it steps backward focusing on the negativity around. B. Covering the real image and real facts about people by focusing on criticism and mindless humor. C. Bassem’s show came as a magnifying lens to reveal both negative and positive aspects about the government and people in authority. 1. Leila Fadel in her article "Egypt’s Jon Stewart Says He Won’t Back down amid Charges" says that Indeed‚ it is a gloomy time in Egypt. The political transition
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Telescopes Hans Lippershey (1570 - September 1619) was a Dutch lens maker. Lippershey is believed to be the first to apply for a patent for his design‚ a few weeks before Jacob Metius (a Dutch instrument maker and optician)‚ and making it available for general use in 1608. The telescope invented by Lippershey was composed of a convex and a concave lens‚ as this construction did not invert the image and had only a magnification of just 3x. Galileo’s telescope improved the original Dutch telescopes
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The magic lantern is an early predecessor of the modern day projector. It consisted of a translucent oil painting‚ a simple lens and a candle or oil lamp. In a darkened room‚ the image would appear projected onto an adjacent flat surface. It was often used to project demonic‚ frightening images in order to convince people that they were witnessing the supernatural. Some slides for the lanterns contained moving parts which makes the magic lantern the earliest known example of projected animation.
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eld Introduc on Some objects are far too small to be seen with the human eye. However‚ by using a microscope many can be viewed in great detail. There are many types of microscopes that range from low–level magni ca on (i.e.‚ hand held magni ca on lens) to very high power magni ca on (i.e.‚ an electron micro scope). In the middle of that range lies the light microscope‚ or for our purposes‚ the compound light microscope‚ which uses mul ple lenses. The compound light microscope (Figure 1) has two
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Spherical power vi. with the slit in this position‚ the fog is reduced to best acuity. vii. the lens in place is the sphere power of the patient’s lens formula (pt’s final sphere) viii. the slit is rotated 90 degrees. This will fog the patient again viiii. the fog is again reduced to best acuity. The algebraic difference between the power of the lens in place at the end of this operation and the lens power in place at the end of step one is the minus cylinder power (c) Advantages - recommended for
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Lab #1 ‐ Introduction to the Microscopy & Observation of Prokaryotic and Eukaryotic Cells Introduction Many of the cells and organisms that you will be studying are at the lower limits of visibility of light microscopes; therefore‚ it is extremely important that you attain critical lighting and focussing. It is also important to handle the microscope competently to avoid damaging either the microscope or the preparation you are studying
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