The following questions talk about increasing magnification in microscopes. Please answer questions 1 and 2 After a specimen is in focus, where in the field of view should position the specimen before increasing the magnification (be precise)? (QUESTION 2 HAS TWO PARTS TO IT): To increase the magnification, which objective should you click into position next? After refocusing the specimen with the new objective, if you want to increase the magnification even more, which objective should you now click into position?

The following questions talk about increasing magnification in microscopes. Please answer questions 1 and 2 After a specimen is in focus, where in the field of view should position the specimen before increasing the magnification (be precise)? (QUESTION 2 HAS TWO PARTS TO IT): To increase the magnification, which objective should you click into position next? After refocusing the specimen with the new objective, if you want to increase the magnification even more, which objective should you now click into position?

Biomedical Instrumentation Systems

1st Edition

ISBN:9781133478294

Author:Chatterjee

Publisher:Chatterjee

Chapter15: Instrumentation In Medical Imaging

Section: Chapter Questions

Problem 9P

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Using the microscope Answer the following questions as you work through this exercise: 1. How is the letter “e” on the slide oriented when you see it with the naked eye as you mount it on the stage (i.e., is it right side up or upside down)? 2. How is the letter “e” on the slide oriented when you see it under low or high power magnification? 3. What effect, if any, does the compound light microscope have on the orientation of the image?
The objective lenses of the microscopes used in this course are all parfocal. What does having parfocal objective lenses mean? Question options: The slide has to be moved away from the objective lens (i.e., lowered) when switching between objective lenses. None of these choices The objective lenses have optimized light gathering capability. Once in focus, you may switch between objective lenses with only fine focus adjustment required.
Complete the following table by calculating the total magnification of the different objectives of the microscope with the given eyepieces. OBJECTIVES OCULAR Designation Magnification Focal Length Numerical Aperture (NA) Final magnification with: 10x 15x 25x Scanner 4x 46mm 0.10 LPO 10x 16mm 0.25 HPO 40x 4mm 0.55 OIO 100x 1.8mm 1.30
Differentiate between the limit of resolution of the typical light microscope and that of the unaided human eyes the relationship between the depth of field and magnification is that When magnification increases, the depth of field decreases. Name two procedures (steps) you should do to achieve the maximum resolution when using the oil immersion lens State the relationship between the working distance of an objective lens and its magnification power “The coarse focus knob can be used to adjust the focus when using any of the objective lenses”. Is this statement true or false? If it is false, please correct it. When using the oil immersion lens but you cannot focus, what should you should not do? And what you should do? What does this statement mean: “Your microscope is parfocal”? What is the significance of condenser lens? Multiple choice question: The most useful adjustment for increasing image contrast in low power magnification is _______ Closing down the diaphragm Closing one…
Please answer the following questions (Question 1 AND 2) about compound microscopes. After clicking the objective into position, which adjustment knob(s) can you use to safely refocus the image? You may need to adjust the light intensity to better see the specimen. Indicate two ways in which you can change the light intensity?
Previous question: The field of view is the maximum area visible through the lenses of a microscope, and it is represented by a diameter. To determine the diameter of your field of view, you can place a transparent metric ruler under the low power (10X) objective of a microscope. You would focus the microscope on the scale of the ruler and measure the diameter of the field of vision in millimeters. Refer to the image taken of this preparation below. What is the approximate field of view as seen by this 10X objective. Note: This microscope has a 10X eyepiece, giving a total magnification of 100X. The image shows the 1mm is for this question. - Answer for this question was 3mm.
Table 1. Objective Lens Scanner Low Power Objective High Power Objective Oil Immersion Objective Total Magnification Objective magnification Ocular magnification Procedure: 1. Locate and record the numbered X in the ocular and the objectives. These numbers represent the magnifying ability of the microscope lenses 2. To compute the magnification, get the product of the magnifying power of the objectives and the eyepiece. Reflect your results in Table 1.3
The compound (bright-field) microscope is parfocal. It means that: Question 4 options: objective lenses are built into revolving nosepiece its lenses effectively decrease focal lenght can achieve maximum resolution lower than 0.2 μm image should remain in focus when objective lens is changed
4) Answer true or false to each of the following statements. On high power, you should use the coarse adjustment knob. The diaphragm determines how much light shines on the specimen. The low power objective has a greater magnification than the scanning objective. The fine focus knob visibly moves the stage up and down. Images viewed in the microscope will appear upside down. If a slide is thick, only parts of the specimen may come into focus. The type of microscope you are using is a scanning microscope. For viewing, microscope slides should be placed on the objective. In order to switch from low to high power, you must rotate the revolving nosepiece. The total magnification of a microscope is determined by adding the ocular lens power to the objective lens power.
Which of the following is a parameter of microscopy that can affect your ability to resolve a specimen using a compound light microscope? Question options: Contrast Resolving power All of the choices Numerical aperture
For a microscope that has an objective lens magnification of 100X and an ocular lens magnification of 5X, calculate the total magnification. 500X O 1000X O 50X O 100X O No listed answer is correct.
The field of view (FOV) is the entire circular image we see when looking into the eyepiece. The diameter of the FOV gets smaller as we increase magnification. It can be measured by using a stage micrometer like a ruler, measuring from edge to edge. Notice that the stage micrometer is 1000 microns (µm) in length, and the field of view under the lowest magnification is 5000 µm. Describe how we measure it?