background ( 3). It has two lenses the objective and the ocular and they create the image by working together. Light pass through the specimen by a light source which is located on the base and is focused by the objective lens which can magnify from 4 to 100 times‚ then the ocular lens further magnifies the image by 10 times. The total magnification is calculated by multiplying the objective and the eyepiece magnification together (3). When a ray of light passes from one medium to another‚ refraction
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LAB 4 Read over the parts of the microscope and answer the following questions: 1. What do you call the lens you look through on the microscope? Ocular 2. What is the difference between the ocular lens and the objective lens? Ocular lens is the lens you look through and objective lens is the lens that is close to the stage. 3. Where do you place the slide on the microscope? the stage under the stage clips 4. Which adjustment‚ course or fine‚ do you use when you are observing the
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phrase in the blank to make the statement true. | 1) The microscope lens may be cleaned with any soft tissue.False. The microscope lenses should clean with a lens cleaner solution and a lens paper due to possible minerals or deposits on the any soft tissue. | | 2) The coarse adjustment knob maybe used in focusing with all objective lenses.False. The coarse adjustment knob should be used during scanning objective lens (lowest power). When it comes to higher objective lenses‚ the fine-focus
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bend light and focus it in one spot. How a Microscope Works Ocular Lens (Magnifies Image) Objective Lens (Gathers Light‚ Magnifies And Focuses Image Inside Body Tube) Body Tube (Image Focuses) •Bending Light: The objective (bottom) convex lens magnifies and focuses (bends) the image inside the body tube and the ocular convex (top) lens of a microscope magnifies it (again). The Parts of a Microscope Ocular Lens Draw Tube Nose Piece Arm LPO HPO Stage Clips Iris Diaphragm Light Source
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CHAPTER – 10 LIGHT-REFLECTION & REFRACTION Light is a form of energy‚ which enable us to see the object. In this chapter we will study the phenomena of reflection and refraction using the property of light i.e. straight line propagation (Light wave travel from one point to another‚ along a straight line). Reflection of Light When the light is allowed to fall on highly polished surface‚ such as mirror‚ most of the light gets reflected. normal Laws of Reflection 1. 2. The angle
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Describe evidence to support the cell theory. • Cell theory evidence accumulated over 600 years with advancement of technology with the microscope and lenses. • 14th century Italian monks invented magnifying glass spectacles. • 1590 first two lens/ compound microscope made by Hans and Zacharias Janssen. • 1676 Leeuwenhoek (Dutch) saw micro organisms under a microscope in a drop of pond water. • 1824 Henri Dutrochet (French) suggested that all organisms are composed of cells. • 1838 Schleiden
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Lecturer’s name : Mr. Zikri Introduction An optical lens is made of transparent material such as glass or clear plastic. One or both surface usually has a spherical curve. There are two types of lenses‚ converging and diverging lens. A converging lens is called a convex lens. It is thicker at the centre than at the edges. A diverging lens is called a concave lens. It is thinner at the centre than at the edges. For a convex lens‚ light rays parallel and close to the principal axis are refracted
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built his own within a month‚[5] and greatly improved upon the design in the following year. The purpose of a telescope is not to magnify‚ as commonly thought‚ but to collect light. The larger the telescope’s main light-collecting element‚ whether lens or mirror‚ the more light is collected. Importantly‚ it is the total amount
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One hand is placed under this when carrying the microscope. 7. Eyepiece - Contains a lens that magnifies about 10X. You look through this. 8. Fine Adjustment Knob - Moves the stage or body tube for focusing with the high-power objective lens. Focuses for details. 9. Course Adjustment Knob - Moves the body tube or stage for focusing with the low-power objective lens. 10. Objective Lens - Magnifies the object from 4X to 40X. 11. Stage Clips – Hold the slide in place on the stage
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Other major types of microscopes are the electron microscope (both the transmission electron microscope and the scanning electron microscope) and the various types of scanning probe microscope. Microscope 1. An optical instrument‚ consisting of a lens‚ or combination of lenses‚ for making an enlarged image of an object which is too minute to be viewed by the naked eye. Parts and Specifications Historians credit the invention of the compound microscope to the Dutch spectacle maker‚ Zacharias
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