270220141122 INTRODUCTION Humans have sight and hearing limitation. Without any devices‚ our sight and hearing was limited. Objective The objective of learning about the limitation of sight and hearing: ● I have learnt that our hearing and sight has limitation. ● I have learnt that we can overcome the limitation of our sight and hearing by using or wearing technology devices. ● The technology devices have make our lives easier. Limitation Of Sight Our sense of sight has its limitations
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toothpick away. 5. Stand a thin glass cover slip on its edge near the drop of dye. 6. Slowly lower the other side of the cover slip until it covers the dye completely. Make sure there are no air bubbles. 7. Make sure the lowest power lens (the shortest lens) is in place over the stage. Place the slide onto the stage of the microscope. 8. Look through the eyepiece and turn the coarse focus knob (the largest knob) until an image comes into focus. It should look like scattered blobs. Move the slide
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the side that lets you check to see what power the lens is. 6- Len stop-Aperture against which the lens rests. 7- Cylinder axis wheel 8- Filter level-Used to engage or remove green filter. 9- Lamp access cover- Provides access to change the lensmeter bulb. 10- Locking lever — Used to elevate or depress the position of the instrument for individual’s height or posture 11- Power drum– The large wheel used to find the power of the lens. It is marked with power ranging from –20 to + 20
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x10 objective lens. You rotate the nosepiece around to x40 but the specimen is not visible. Describe what you should do next? Start by using the fine adjustment to attempt to focus on the Euglena. However‚ if it is still not visible‚ return to the x10 objective lens and use the fine adjustment to ensure the Euglena is as sharply focused as possible. Then‚ use the stage control to re-position the slide so the Euglena is directly in the centre of the lens. Return to the x40 objective lens‚ and the Euglena
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to allow more or less light. It is typically a plastic disk located between the light source and the specimen mount. The compound microscope has two systems of lenses for greater magnification‚ 1) the ocular or eyepiece lens that one looks into and 2) the objective lens‚ or the lens closest to the object. A microscope works by using lights‚ mirrors‚ and glass to magnify. The mirrors and glass bend the light in a certain way that it makes small objects appear larger. Method Procedure 1.2 Handling
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1) The condenser lens concentrates light and makes illumination of image more uniform. 2) The bending of light is also known as refraction. 3) Total magnification = ocular lens magnification x objective lens magnification. 4) The total magnification of an image is 1200x and the magnification of the ocular lens is 10x. What is the magnification of the objective lens? Y = objective lens 1200x = 10x X y 1200x / 10x = y y = 120x Objective lens magnification = 120x 5) The limit of resolution
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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 micrometer has no units. 5. Objective lens The objective lens gathers light from the specimen‚ magnifies the image of the specimen‚ and projects the magnified image into the body tube. Since no single objective lens can fulfill all the needs of someone using the microscope‚ several objective
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how to use a microscope and oil immersion lens while observing prepared bacterial slides and also to prepare slides for observable bacteria culture from yogart. Procedure: Exercise 1: Using the Microscope - Viewing Prepared Slides I started out by reading and reviewed the science lab safety reinforcement Agreement and the instruction to oil immersion lens. After setting up my lab station I view the six prepared slides with 10x and 40x objctives lens. In each slide the differences was magnification
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PC1222 Fundamentals of Physics II Tutorial 8 1. Refraction of Light I. When a man stands near the edge of an empty drainage ditch of depth 2.80 m‚ he can barely see the boundary between the opposite wall and bottom of the ditch as shown. The distance from his eyes to the ground is 1.85 m. (a) What is the horizontal distance d from the man to the edge of the drainage ditch? (b) After the drainage ditch is filled with water as shown‚ what is the maximum distance x the man can stand from the edge
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Microbiology Kit (MBK) – Lab Report Observing Bacteria and Blood Questions: List the following parts of the microscope and describe the function of each A. Ocular Lens- the lens on the top of the microscope that look into with 10x or 15x power. B. Body Tube- Connects eye piece to the objective lens C. Revolving Nosepiece- holds two or more objectives lenses and can be rotated easily to change power D. Objective lenses- 4x‚ 10x‚ 40x‚ and 100x powers E. Stage- The flat plate where the slides
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