#1
Which part of the microscope supports the stage?
Base
ExplanationThe base of the microscope provides stability and support to the entire instrument.
#2
What is the function of the condenser in a microscope?
To focus light onto the specimen
ExplanationThe condenser concentrates and directs light onto the specimen for better illumination.
#3
What is the function of the diaphragm in a microscope?
To control the amount of light entering the microscope
ExplanationThe diaphragm regulates the intensity and angle of light entering the microscope for optimal illumination.
#4
What is the purpose of staining specimens in microscopy?
To enhance contrast and visibility of structures
ExplanationStaining improves contrast by highlighting specific structures, making them more visible under the microscope.
#5
What is the maximum magnification typically achieved with a light microscope?
1000x
ExplanationLight microscopes generally have a maximum magnification of around 1000x.
#6
Which type of microscope is best suited for viewing live, unstained specimens?
Phase-contrast microscope
ExplanationPhase-contrast microscopy enhances contrast in transparent specimens, making it ideal for live observations.
#7
What does the term 'resolution' refer to in microscopy?
The ability to distinguish between two separate points
ExplanationResolution in microscopy is the capability to distinguish fine details and separate points in an image.
#8
What is the purpose of immersion oil in microscopy?
To enhance light transmission
ExplanationImmersion oil improves the efficiency of light transmission, especially at high magnifications.
#9
In which type of microscopy is a beam of electrons used to create an image?
Electron microscopy
ExplanationElectron microscopy utilizes a beam of electrons to achieve high-resolution imaging.
#10
Which microscope technique is used to observe dynamic processes in living cells?
Fluorescence microscopy
ExplanationFluorescence microscopy is ideal for real-time observation of living cells, highlighting specific molecules with fluorescent dyes.
#11
Which microscope technique relies on differences in refractive index to produce contrast in specimens?
Phase-contrast microscopy
ExplanationPhase-contrast microscopy exploits variations in refractive index to create contrast in specimens.
#12
Which microscope technique is commonly used for observing the surface of solid specimens?
Atomic force microscopy
ExplanationAtomic force microscopy is employed for high-resolution imaging of solid surfaces.
#13
What is the purpose of a phase ring in phase-contrast microscopy?
To create contrast in the image
ExplanationThe phase ring enhances contrast in phase-contrast microscopy by altering the phase of light passing through the specimen.
#14
Which type of microscope is used to visualize the internal structure of specimens in three dimensions?
Confocal microscopy
ExplanationConfocal microscopy provides detailed 3D visualization of internal structures by focusing on a single plane at a time.
#15
Which microscope technique is used to study the detailed structure of surfaces at the nanometer scale?
Scanning electron microscopy
ExplanationScanning electron microscopy is employed for high-resolution imaging and analysis of surfaces at the nanometer scale.