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WorksheetsMicroscopy Quiz
Total questions: 15
Worksheet time: 8mins
Which part of the compound microscope helps in gathering and focusing light rays on the specimen to be viewed
Eyepiece lens
Objective lens
Condenser lens
Magnifying lens
What is the minimum distance for the eye to focus any object?
11 cm
25 cm
32 cm
42 cm
Resolving power of a microscope is a function of ____________
Wavelength of light used
Numerical aperture of lens system
Refractive index
Wavelength of light used and numerical aperture of lens system
The greatest resolution in light microscopy can be obtained with ___________
Longest wavelength of visible light used
An objective with minimum numerical aperture
Shortest wavelength of visible light used
Shortest wavelength of visible light used and an objective with the maximum numerical aperture
Oil immersion objective lens has an NA value of____________
0.65
0.85
1.33
1.00
In fluorescence microscopy, which of the following performs the function of removing all light except the blue light?
Exciter filter
Barrier filter
Dichroic mirror
Mercury arc lamp
Total Magnification is obtained by __________
Magnifying power of the objective lens
Magnifying power of eyepiece
Magnifying power of condenser lens
Magnifying power of both the objective lens and eyepiece
Which part of the light microscope controls the intensity of light entering the viewing area?
Coarse adjustment screw
Fine adjustment screw
Diaphragm
Condenser lens
If you were given a specimen of an active, motile microorganism, which of the following types of microscopy would be the most effective in visualizing the live microbe?
bright-field microscopy
dark-field microscopy
fluorescence microscopy
phase-contrast microscopy
scanning electron microscopy
The instrument that produces a bright image of the specimen against a dark background is called a__________ microscope
phase-contrast
transmission electron
bright-field
dark-field
What do phase-contrast and dark-field microscopes have in common?
They increase contrast between the specimens and their surroundings without staining.
They make specimens appear dark on a bright background
They make specimens fluoresce
They make specimens visible that refract light away from the objective
All of the following microorganisms can be observed with the bright-field microscope EXCEPT
viruses
fungi
algae
protozoa
bacteria
Which microscope lens does not magnify the imaged formed?
magnetic lens
ocular lens
objective lens
condenser lens
none of the above
If the minimum image size the human eye can detect is 0.1 mm, what is the minimum magnification needed to make an object measuring 1 um visible?
10x
100x
1,000x
10,000x
100,000x
What is the total magnification of a 10x ocular lens and a 45x objective lens?
15x
45x
150x
450x
