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The optics of a microscope’s lenses change the orientation of the image that the user sees. Similarly, if the slide is moved left while looking through the microscope, it will appear to move right, and if moved down, it will seem to move up. This occurs because microscopes use two sets of lenses to magnify the image. How will the direction of slide movement viewed through the microscope differ from the direction you are actually moving a slide?The ant moves toward the bottom of the slide and then it moves to the right. Because the objects viewed through the microscope appear to move in a direction exactly opposite to that of their actual movements, the ant must have moved toward the top of the slide and then to the left. What part of the microscope do you use to move the slide forward or backward left or right?Stage clips hold the slides in place. If your microscope has a mechanical stage, the slide is controlled by turning two knobs instead of having to move it manually. One knob moves the slide left and right, the other moves it forward and backward. What controls the movement of the slide on the stage?MECHANICAL STAGE CONTROLS — A geared device to move the slide (placed in the slide clamp) precisely. 4. COARSE ADJUSTMENT KNOB — A rapid control which allows for quick focusing by moving the objective lens or stage up and down. It is used for initial focusing. What are the two function of the eyepiece?Answer. 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. What happens if you try to use the coarse adjustment when the 10x lens is in place?What happens if you try to use the coarse adjustment when the 10X lens is in place? The focus of the specimen would be unclear with a high objective power and the stage lifted high due to the coarse adjustment. There is a warning it is not good to change coarse focus under high power. How do you prevent the slide from falling off the stage?How can you prevent your slide from slipping on the stage? Use the stage clips. Is the image seen through the microscope oriented the same way as the object on the stage of the microscope? Explain. What do you use to focus and clearly see your specimen?Compound Microscopes Look at the objective lens (3) and the stage from the side and turn the focus knob (4) so the stage moves upward. Move it up as far as it will go without letting the objective touch the coverslip. Look through the eyepiece (1) and move the focus knob until the image comes into focus. What happens if you use direct sunlight to observe your specimen?Never use direct sunlight; it may damage your eyes. Color the light source yellow. The switch for this light is usually found on the base of the microscope, and sometimes on the power cord. After the light has passed through the specimen, it enters the objective lens (often called “objective” for short). What will you do if the specimen you are observing under the microscope is blurry?Explanation: If you cannot see anything, move the slide slightly while viewing and focusing. If nothing appears, reduce the light and repeat step 4. Once in focus on low power, center the object of interest by moving the slide. What is the purpose of using iodine when making a wet mount?Iodine Solution is often used in wet mounts of concentrated fecal material. It is useful for staining glycogen and making nuclei visible in protozoan cysts. Protozoan cysts correctly stained with iodine contain yellow-gold cytoplasm, brown glycogen material, and paler refractile nuclei. What does iodine do to cells?Function. Iodine is needed for the cells to change food into energy. Humans need iodine for normal thyroid function, and for the production of thyroid hormones. Why is iodine used in staining?Iodine is one component in the staining technique known as Gram staining, used in microbiology. Used as a mordant in Gram’s staining, iodine enhances the entrance of the dye through the pores present in the cell wall/membrane. How is iodine used as a biological stain?Iodine is a useful stain as well. Iodine is used when studying plant cells. It reacts with starch and turns blue-black, because it is a starch indicator. Iodine can work as a stain on animal cells as well, causing the cell membrane and nucleus to appear more visible. Why do we add a drop of iodine solution in microscopy work?Given that iodine tends to bind to starch, it stains the starch granules when the two come in to contact making them visible. Although onions may not have as much starch as potato and other plants, the stain (iodine) allows for the little starch molecules to be visible under the microscope. Why do we add iodine to onion cells?Iodine– dark stain that colors starches in cells. In an onion cell, it will make the cell wall more visible. It provides some contrast for viewing under a microscope. What are the effects of iodine on the parasites?The majority of parasitic organisms and cysts adopt a brown coloration when stained with Lugol’s Iodine. When stained correctly, protozoan cysts contain yellow-gold cytoplasm, brown glycogen material, and paler refractile nuclei. Does nascent iodine kill parasites?Iodine helps with the following: Kills all viruses. Kills all fungus. Kills all parasites. What happens when you move the slide to the right?9. The proper way to use a microscope is to look through the eyepiece with both eyes open to help avoid eye strain. Remember, everything is upside down and backwards. When you move the slide to the right, the image goes to the left!
What happen to image when you move the slide to the right?Due to INVERSION, when you move the slide to the RIGHT, the image of the slide that is seen through the oculars (or eye-pieces) appears to move LEFT. And, when you move the slide to the LEFT, the image of the slide that is seen through the oculars (or eye-pieces) appears to move RIGHT.
What happens when you move a slide to the left microscope?A specimen that is right-side up and facing right on the microscope slide will appear upside-down and facing left when viewed through a microscope, and vice versa. Similarly, if the slide is moved left while looking through the microscope, it will appear to move right, and if moved down, it will seem to move up.
What moves the slide left and right on a microscope?The stage clamp holds the microscope slide in place. Below the stage is a set of knobs called the STAGE ADJUSTMENT KNOBS. The top (larger) stage adjustment knob moves the stage vertically (towards you and away from you). The bottom (smaller) stage adjustment knob moves the stage horizontally (left/ right).
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What happens when you move a microscope slide to the right
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