Which of the following demonstrates the proper use of the compound light microscope? A. When using...
Which of the following demonstrates the proper use of the compound light microscope?
A. When using the oil immersion lens, we can also use the coarse adjustment knob to focus to get a clearer image.
B. We should adjust the iris diaphragm to allow more light in at higher magnifications.
C. If we are not able to get a clear image with the oil immersion lens, we should bring the high dry(40x) into position to refocus.
D. When viewing a specimen, it is ok to start focusing with the high dry lens.
Homework Answers
Answer is D
in answer A fine adjustment is used because oil immersion lens is used to see very tiny objects
In answer B adjustment should be in mirror not in iris diaphragm
In answer C oil immersion lens is used to see the tiny object than the high magnified dry lenses
In answer D after focusing on the object we also see the clear image by high dry lenses
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Which of the following demonstrates the proper use of the
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1. Name at least 3 ways you can control the amount of light that reaches the...
1. Name at least 3 ways you can control the amount of light that reaches the ocular lens. 2. Define resolution. What is the limit of resolution for the light microscope? 3. What effect does the wavelength of light used have on resolution? 4. If you view a bacterial smear under the oil immersion lens, but forget to add oil, will the image still be just about as clear as if you had added the oil. 5. Define parfocal. 6....
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EXERCISE 1:USE AND CARE OF THE MICROS D CARE OF THE MICROSCOPE 11. Alter use, remove...
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Evaluate the following statements, and select those that correctly apply to the properties of microscopes. When...
Evaluate the following statements, and select those that correctly apply to the properties of microscopes. When observing specimens with the 100x lens, adding a drop of oil to the slide will improve the resolving power; the image will be clear rather than blurry. If oil is not used with the 100x lens, the virtual image will be less bright, compared to specimens observed with a drop of oil on the slide. The degree of contrast between a specimen and its...
ur eyes. Each new lab day, as you begin to study your arst slide, repeat this...
ur eyes. Each new lab day, as you begin to study your arst slide, repeat this procedure, arssm increase or decrease the contrast by adjusting the iris dia- u em opening. Note that the maximum amount of light provides itle contrast. Adjust the aperture until the imageis sharp. littie Move the slide slowly to the right. In what direction does the image in the ocular move? n. Is the image in the ocular inverted relative to the specimen on the...
3. In a bright-field compound microscope, starting from the illuminator, follow the pathway of light: a. The first lens that provides magnification of the image is the c lor lens. b. The lens that further enlarges the image ten more times is the low power nel lens. 4. Open the iris diaphragm all the way while using the low power objective. What happens to the field of view and the quality of the image? Now close the iris diaphragm all...
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Objective lens Refracted (lost) light rays, VY Immersion oil Slide Condenser - ( Light source Figure 2 Refractive index in air and in mineral oil Carrera attachment Eyeplece focular lens) Light pathway LU Arm Body tube Objective Coarse and fine focusing adjustment knob Stage Light source Spircimen Condenser Illuminator Figure 3 Pathway of light in a compound scope Microscopy/Microscopic Examination of Stained Cell Preparations Q8 Use Figure 2 and 3 in the lab info to answer the following question. Which...
EXERCISE 1: USE AND CARE OF THE MICROSCOPE 13 0 Move the high-dry lens out of position, and place a drop of immersion oil on the area of the slide you are observing. Carefully click the oil immersion lens into position. It should now be immersed in the oil (FIGURE 1.5). Careful use of the fine-adjustment knob should bring the object into focus. Note the shape and size of the cells. Did the color of the cells change with the...
Lab activities and worksheets Read through this section before you get to lab so you are aware of what you will be doing for this lab. Microscope labeling It is important to know the structure of something in order to know how it works and how to use it. Use the following list of parts of a compound microscope to label the diagram. Be sure to understand the functions of each part. Ocular: this is the lens at the top...
EXERCISE 1:USE AND CARE OF THE MICROS D CARE OF THE MICROSCOPE 11. Alter use, remove the slide, wipe oil of it, put dist cover on the microscope, and return it to the designated area. 12. When a problem does with the microscope obtain help from the instructor. Do not use other microscope unless yours is declared out of action." FIGURE 14 Focusing the condenser. () Ching low power, lower the condenser til distinct circle of light is visible. Cester...
Evaluate the following statements, and select those that correctly apply to the properties of microscopes. When observing specimens with the 100x lens, adding a drop of oil to the slide will improve the resolving power; the image will be clear rather than blurry. If oil is not used with the 100x lens, the virtual image will be less bright, compared to specimens observed with a drop of oil on the slide. The degree of contrast between a specimen and its...
ur eyes. Each new lab day, as you begin to study your arst slide, repeat this procedure, arssm increase or decrease the contrast by adjusting the iris dia- u em opening. Note that the maximum amount of light provides itle contrast. Adjust the aperture until the imageis sharp. littie Move the slide slowly to the right. In what direction does the image in the ocular move? n. Is the image in the ocular inverted relative to the specimen on the...
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