17 Questions
Which microscope type uses lasers and fluorescence to create a three-dimensional image of a sample?
Confocal microscope
What type of microscope was invented by Ernst Ruska in 1931?
Electron microscope
Which microscope is used to visualize specimens that fluoresce, like Auramine phenol for M. tuberculosis?
Brightfield microscope
What do electron microscopes examine that must be smaller than about 0.2 μm?
Viruses or internal cell structures
Which microscope principle involves converting ultraviolet rays into visible light?
Fluorescence principle
What does resolution power refer to in a microscope?
Ability to produce separate images of closely placed objects
How is good contrast in microscopy achieved?
By staining the specimen
Which type of microscope is commonly used in the microbiology section?
Brightfield microscope
What is the principle behind a darkfield microscope?
Object appears bright against a dark background
How is magnification achieved in microscopy?
By using concave lenses
What does a phase-contrast microscope help visualize?
Shape of living cells
What part of the microscope can be rotated to switch between the objective lenses?
Objective lens
Which objective lens provides the lowest magnification power?
Scanner (Red)
What is the function of the fine adjustment knob in a microscope?
Move the stage slowly for detailed focus adjustment
Which part of the microscope is responsible for gathering and focusing light from the illuminator onto the specimen?
Condenser
What is the main function of the iris diaphragm in a microscope?
Change light intensity reaching the specimen
Which type of microscope illumination technique does the darkfield microscopy use?
Darkfield
Test your knowledge on the properties of a good microscope such as resolution, contrast, and magnification, as well as different types of microscopes. Explore how microscopes are used to magnify small objects and fine details.
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