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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microscope. The term "compound" means more than one lens is used. In the compound microscope you have two lenses. The primary lens is the one closest to the object and then there is the secondary lens‚ which is furthest from the object. The secondary lens is used to magnify the image of the primary lens. The primary lens is aimed at the condenser‚ or stage‚ and this is where the object to be magnified in the form of a slide is placed. A modern compound lens can magnify the original diameter of specimens
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compound light microscope is a series of lenses (hence "compound") that focus visible light in such a way as to produce a magnified image. A single lens‚ often called a magnifying glass‚ cannot generally magnify images as much as a series of lenses although Antony van Leeuwenhoek‚ the first microbiologist‚ used a simple‚ albeit exquisitely crafted‚ lens to discover single-celled "animalcules‚" as he called them. Advantages: Basic compound light microscopes are inexpensive and relatively easy to use
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Lab No. 2: The Microscope Light microscopy The bright field microscope is best known to students and is most likely to be found in a classroom. Visible light is focused through a specimen by a condenser lens‚ then is passed through two more lenses placed at both ends of a light-tight tube. The latter two lenses each magnify the image. Limitations to what can be seen in bright field microscopy are not so much related to magnification as they are to resolution‚ illumination‚ and contrast
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viewing the onion cell through the microscope. Place the microscope slide onto the microscope stage. Place the microscope stage clips onto the slide. This will prevent the microscope slide from moving during observation. Ensure that the microscope’s lens magnification is at either x10 or x40. Look through the eye-piece and draw what you can see. Post-Practical - After the Experiment/Tidying away equipment; Turn the focusing handle so that the microscope lenses are at the top of the microscope.
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plug it into an outlet. 3. Using Figure 2.2 as a guide‚ locate and identify each ocular and objective lens. Record the magnification of each lens and the total magnification. Total magnification is calculated by multiplying the magnification of the ocular (10x) by the magnification of the objective (10x‚ 40x‚ 400x). Lens Used 10x objective lens 40x objective lens 100x objective lens with oil Lens Magnification Total Magnification 4-2 Figure 4.2. Parts of a Microscope 4-3 Figure 4
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Home Work 7 3/3/15‚ 9:30 AM Home Work 7 Due: 11:59pm on Monday‚ March 9‚ 2015 You will receive no credit for items you complete after the assignment is due. Grading Policy Problem 23.08 A solar cooker‚ really a concave mirror pointed at the Sun‚ focuses the Sun’s rays 19.3 cm in front of the mirror. Part A What is the radius of the spherical surface from which the mirror was made? Express your answer to three significant figures and include the appropriate units. ANSWER: r= Problem 23.09
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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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The listener can hear normal and abnormal respiratory‚ cardiac‚ pleural‚ arterial‚ venous‚ uterine‚ fetal‚ and intestinal sounds. Telescope To see far objects such as stars and planets. Besides that‚ it consists of two convex lenses ( eyepiece lens) Binoculars Provide stereoscopic vision of distant objects for seeing tiny object . A pair of identical telescope mounted side by beside in the same direction allowing the viewer to use both eyes when viewing distant objects. Ultrasound scanning
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There are three main designs of telescopes; refractors‚ reflectors‚ and a catadioptric. The refracting telescope is one of the most common telescopes. The refractor telescope captures an image through the lens and bends it. After it is bent‚ it is sent to the focal point and modified by the lens and viewed through the eye piece‚ (Telescopes‚ 2013). The refracting telescope is among one the most popular telescopes because the strengths of the telescope. This type of telescope is long lasting‚ useful
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