(b) Formation of lysosomes. State three functions of Golgi apparatus. Below are diagrams of a cell organelle obtained from different organs of an animal. Where the magnification of the objective is Mo and the eyepiece magnification is Me. (a) State two advantages of using a coverslip when preparing a specimen for observation under a light microscope. Definition: The ratio of the size of the image formed by refraction from the lens to the size of the object, is called linear magnification produced by the lens. Formula to calculate magnification. The ocular lens is a convex lens, so the equation of the linear magnification of the ocular lens is the same as the equation of the linear magnification of the convex lens. For more math formulas, here is an article about Newton’s laws. Show your working. If the image and the object are both in the same physical medium (e.g., water, air or outer space), then the lateral magnification formula is the size of the image divided by the size of the object: Here M is the magnification, i is the image height and o is the object height. This is where the magnification calculation is necessary. The negative sign as applied to an image that appears on the opposite side of the lens from the object indicates that the image is "real," i.e., that it can be projected onto a screen or some other medium. State one way in which each of the following is naturally adapted to its function: 2. Say you position a tube of lipstick 10 cm from a convex lens with a focal length of 6 cm. (a) Neurone. 9. (a) Ribosome. (b) Give a reason why staining is necessary when preparing specimens for observation under the microscope. mob = the linear magnification of the objective lens, l = distance between the objective lens and ocular lens, dook = distance of the real image from the ocular lens, doob = the object distance from the objective lens. The required linear magnification is the ratio of the desired image diameter to the diamond’s actual diameter (Equation 2.8.12). A virtual image, on the other hand, appears on the same side of the lens as the object and is not associated with a negative sign in pertinent equations. 9. 10. (a) Name the part of a light microscope used to bring an image of a specimen into sharp focus. That is, the ratio of the height of the object to the height of its image is the same as the ratio of the length of the object to the length of its image. Copyright 2020 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. (b) Name the plant cell organelle: State the function of the organelles: You can experiment with different numbers here to gain a sense of how altering the physical set-up affects the optical results in this type of problem. (a) Golgi apparatus State two functions of the endoplasmic reticulum. (ii) State the function of F. 10. (b) Give a reason why staining is necessary when preparing specimens for observation under the microscope. Linear Magnification For Lens. Magnification of Compound Microscope 2. (b) Give a reason why staining is necessary when preparing specimens for observation under the microscope. Formerly with ScienceBlogs.com and the editor of "Run Strong," he has written for Runner's World, Men's Fitness, Competitor, and a variety of other publications. a) What is the formula for calculating linear magnification of a specimen when using a hand lens b) Give a reason why staining is necessary when preparing specimens for observation under the microscope. If the actual length of the flower was 12cm, calculate the magnification of the drawing made by the student. State three functions of Golgi apparatus. Fine adjustment knob. Plant cells do not burst when immersed in distilled water. (iii) With reference to the nucleus, state one difference between an animal and a bacterial cell. Thin lens equation 1 1 1 d d f oi The linear magnification m is defined as the ratio of the image size h i to the object size h o: Magnification of the Human EyeRefraction It is … (a) Manufacture of lipids. Explain. Protein Synthesis © 2020 Tutorke Limited. Show your working. All rights reserved. When light rays traveling in parallel are bent as they pass through a convex lens, they are bent toward, and thus become focused on, a common point on the opposite side of the lens. (a) Name the cell. (a) Skeletal muscle cell (a) Name the parts labeled A and B. Linear magnification, also called lateral magnification or transverse magnification, is just the ratio of size of the image of an object created by a lens to the object's true size. The diagram below shows a specified plant cell. (a) (i) Name the cell. State three functions of Golgi apparatus. ; Place the slide that you want to view over the aperture and gently move the stage clips over top of the slide to hold it into place. More about Kevin and links to his professional work can be found at www.kemibe.com. (c) State two main functions of the vacuole in the amoeba. Kevin Beck holds a bachelor's degree in physics with minors in math and chemistry from the University of Vermont. Microscopes, binoculars and telescopes all magnify things using the special tricks embedded in the nature of light-transducing lenses in a variety of shapes. Linear magnification refers to one of the properties of convex lenses, or those that show an outward curvature, like a sphere that has been severely flattened. The diagram below illustrates a specialized cell obtained from a certain tissue. State the functions of the following parts of a light microscope. (a) Making thin plant sections. If the image and the object are both in the same physical medium (e.g., water, air or outer space), then the lateral magnification formula is the size of the image divided by the size of the object: M = \frac {-i} {o} M = o−i Here M is the magnification, i is the image height and o is the object height. Name the organelle in which protein synthesis takes place. The power of a magnifying lens is just the inverse of its focal length: P = 1 / f. This means that lenses that have short focal lengths have strong magnification capabilities, whereas a higher value of f implies lower magnifying power. Figuring Total Magnification. (b) Why is it recommended to keep the stage of the microscope dry? (a) State the function of a mirror in a light microscope. Calculate the average length of cells. (b) How is the structure labeled B adapted to its function? (b) Golgi apparatus. This point, F, is called the focal point, and the distance to F from the center of the lens, denoted f, is called the focal length. (b) Give one reason why the coarse adjustment knob should not be used to lower the high power objective. The Magnification Equation for a Microscope. A negative sign is omitted because the … (a) What is the formula for calculating linear magnification of a specimen when using a hand lens? Note that this is another way to express the concept of linear magnification. 2.1 The linear magnification of the objective lens when the accommodation os eye is maximum. Their counterparts in the optical world are concave lenses, or those that are curved inward and bend light rays differently than convex lenses. (i) For each organelle, state an organ in the urinary system where it is likely to be found. April 28, 2019 by Veerendra. Because the jeweler holds the magnifying lens close to his eye and the image forms at his near point, the linear magnification is the same as the angular magnification, so M = m = hi ho = 15mm 3.0mm = 5.0. (a) What is the formula for calculating linear magnification of a specimen when using a hand lens? (a) What is the formula for calculating linear magnification of a specimen when using a hand lens? Georgia State University Hyperphysics: Image Formation by Lenses, LibreTexts Physics: Image Formation by Lenses, University of Plymouth Physics: The Lens Equation.