Microbiology with Diseases by Taxonomy - With Access
5th Edition
ISBN: 9780134578019
Author: BAUMAN
Publisher: PEARSON
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Chapter 4, Problem 5MC
Summary Introduction
Introduction:
Lens is the major aid to identify and visualize smaller objects. The lenses help in magnifying a specimen and increase resolution of the specimen. The various properties of lens such as curvature, thickness and so on, make it suitable as a helping tool of microscope.
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The coarse and fine focus knobs adjust the distance betweena. the objective and ocular lenses.b. the ocular lenses.c. the ocular lenses and your eyes.d. the stage and the condenser lens.e. the stage and the objective lens.
All other things being equal, the objective lens with the highest value for numerical aperture (N.A.) will always have the lowest______?
A. Field Of View
B. Magnification
C. Image Quality
D. Limit Of Resolution
Which of the following will decrease the limit of resolution (Select all that applies)
a) using lower wavelength of illumination
b) using an objective lens with lower numerical aperature
c) using immersion oil
d) using electron as the source of illumination instead of light
Chapter 4 Solutions
Microbiology with Diseases by Taxonomy - With Access
Ch. 4 - Prob. 1MCCh. 4 - A nanometer is ________ than a micrometer. a. 10...Ch. 4 - Prob. 3MCCh. 4 - Curved glass lenses _________ light. a. refract b....Ch. 4 - Prob. 5MCCh. 4 - Prob. 6MCCh. 4 - Which of the following types of microscopes...Ch. 4 - Prob. 8MCCh. 4 - Prob. 9MCCh. 4 - Prob. 10MC
Ch. 4 - If an objective magnifies 40 and each binocular...Ch. 4 - The type of fixation developed by Koch for...Ch. 4 - Immersion oil ________ (increases/decreases) the...Ch. 4 - Prob. 4FIBCh. 4 - Prob. 5FIBCh. 4 - Prob. 1VICh. 4 - Label the microscope.Ch. 4 - Prob. 1SACh. 4 - Critique the following definition of magnification...Ch. 4 - Prob. 3SACh. 4 - Prob. 4SACh. 4 - Prob. 5SACh. 4 - Give three characteristics of a specific epithet.Ch. 4 - Prob. 7SACh. 4 - Prob. 8SACh. 4 - Prob. 1CTCh. 4 - Prob. 2CTCh. 4 - Prob. 3CTCh. 4 - Prob. 4CTCh. 4 - Prob. 5CTCh. 4 - In what ways are the Gram stain and the acid-fast...Ch. 4 - Microbiologists have announced the discovery of...Ch. 4 - Why is the genus name Coccus placed within...Ch. 4 - A clinician obtains a specimen of urine from a...Ch. 4 - Using the following terms, fill in the following...Ch. 4 - Prob. 1TMWCh. 4 - Prob. 2TMWCh. 4 - Prob. 3TMWCh. 4 - Prob. 4TMWCh. 4 - Prob. 1EDCS
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- How can you improve contrast when viewing a specimen?. What should you do if you have difficulty focusing in high power?. Why is important to use the fine adjustment nob only when focusing while using the high dry objective lens?arrow_forwardThe least distance of distinct vision for an eye lens is caused by the action of the:(a) 25 m(b) 2.5 cm(c) 25 cm(d) 2.5 marrow_forwardThe most useful adjustment for increasing image contrast in lowpower magnification is a. closing down the diaphragm. b. closing one eye. c. opening up the diaphragm. d. placing a drop of oil on the slide. e. using a blue filter.arrow_forward
- What is the rule for determining total magnification? A. Ocular lens magnification + objective lens magnification = total magnification B. Ocular lens magnification - objective lens magnification = total magnification C. Ocular lens magnification x objective lens magnification = total magnificationarrow_forwardwhat happens when you change the objective lensearrow_forwardTotal Magnification is obtained by Select one: A. Magnifying power of both the objective lens and eyepiece B. Magnifying power of eyepiece C. Magnifying power of condenser lens D. Magnifying power of the objective lensarrow_forward
- The change in focal length of an eye lens is caused by the action of the:(a) Pupil(b) Retina(c) Cilliary muscles(d) Irisarrow_forwardThe total magnification achieved when using a 100× oil immersion lens with 10× binocular eyepieces is a. 10×. b. 100×. c. 200×. d. 1000×. e. 2000×.arrow_forwardWhy must the angle of astigmatism be determined before the corrective power of the lenses ? the corrective power is determined first , it will be difficult to determine which are blurry the corrective power is determined first , will look blurry If the corrective power is determined first , all lines will look clear .arrow_forward
- Why is it advisable to start first with the low-power lens when viewing a slide?arrow_forward1. Calculate the total magnification for the following: A. Scanning power objective = 5x; eyepiece =4x B. High power objective = 40x; eyepiece= 5x c. Low power objective = 10x; eyepiece= 10xarrow_forwardWhich lens requires the use of cedarwood oil? Why is it important to use oil when focusing under this lens?arrow_forward
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