use cosmetic contact lenses or not” Abstract In Asia‚ girls wearing the cosmetic contact lenses are already become trendy‚ it is very popular these few years. What are cosmetic contact lenses? When you go shopping or buying something online‚ you may seen some cosmetic contact lenses that they say wearing the cosmetic contact lenses you can get a big eye or switch your color from brown to blue. They also use many models who are charming and wearing the cosmetic contact lenses to attract more girls
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IMPORTANT STEPS TO REDUCE THE RISK OF WEARING CONTACT LENSES General purpose = To inform Specific purpose = To inform my audience about the important steps to reduce the risks of wearing contact lenses. Central idea = There are three important important steps to reduce the risks of wearing contact lenses which are cleans hands properly and use the correct contact lens solution‚ follow the correct contact
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Microscopy and the Metric System Margaret E. Vorndam‚ M.S. Version 42-0090-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports
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answer line. If false‚ write a word or phrase in the blank to make the statement true. F | 1) The microscope lens may be cleaned with any soft tissue. | F | 2) The coarse adjustment knob maybe used in focusing with all objective lenses. | T | 3) When beginning to focus‚ the lowest power lens should be used. | T | 4) Resolution decreases as the amount wavelength of light increases. | F | 5) When focusing always focus toward the specimen. | B.
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• The Greeks & Romans used “lenses” to magnify objects over 1000 years ago. The History Zacharias Jansen 1588-1631 The “First” Microscope The History • Hans and Zacharias Janssen of Holland in the 1590’s created the “first” compound microscope • Anthony van Leeuwenhoek and Robert Hooke made improvements by working on the lenses Anthony van Leeuwenhoek 1632-1723 Hooke Microscope Robert Hooke 1635-1703 How a Microscope Works Convex Lenses are curved glass used to make
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both eyes. The monocular (single eye usage) microscope does not need a diopter. Binocular microscopes also swivel (Interpupillary Adjustment) to allow for different distances between the eyes of different individuals. * Objective Lenses are the primary optical lenses on a microscope. They range from 4x-100x and typically‚ include‚ three‚ four or five on lens on most microscopes. Objectives can be forward or rear-facing. * Nosepiece houses the objectives. The objectives are exposed and are mounted
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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 Janssen‚ around the year 1590. The compound microscope uses lenses and light to enlarge the image and is also called an optical or light microscope (vs./ an electron microscope)
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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 knob should mostly be used and
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the knob. Because of this‚ the coarse adjustment should only be used with low power (4X and 10X objetives) and never with the high power lenses (40X and 100X). 3. Fine adjustment This knob is inside the coarse adjustment knob and is used to bring the specimen into sharp focus under low power and is used for all focusing when using high power lenses. 4. Ocular lens The ocular lens‚ or eyepiece‚ magnifies the image. It contains a measuring scale called and ocular micrometer. The ocular
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viewing very small objects‚ typically magnified several hundred times. It consist of different lenses such as: Scanning = 4X‚ Low power = 10X‚ High power = 40 or 43X‚ Oil Immersion = 100X. A microscope is an instrument to see objects too small for the naked eye. It’s a device used for magnifying small entities which cannot be seen by the eyes without any additional aid‚ it uses combination of magnifying lenses with a rotator that can be used to adjust the item view option. It is made out of glass that
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