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Transmission electron microscopy: Quiz


Question 1: Electrons are usually generated in an electron microscope by a process known as thermionic emission from a filament, usually tungsten, in the same manner as a light bulb, or alternatively by ________.
Electronic band structureQuantum tunnellingQuantum mechanicsField electron emission

Question 2: The interaction of electrons with a magnetic field will cause electrons to move according to the right hand rule, thus allowing for ________ to manipulate the electron beam.
Magnetic fieldTransformerInductorElectromagnet

Question 3: This image provides the investigator with information about the ________ symmetries in the crystal and the crystal's orientation to the beam path.
Group (mathematics)Space groupCrystal systemCrystal structure

Question 4: [18] Additional quad or hexapole lenses allow for the correction of asymmetrical beam distortions, known as ________.
Optical aberrationAstigmatismOpticsAstigmatism (eye)

Question 5: The majority of electron lenses for TEM utilise electromagnetic coils to generate a ________.
Lens (optics)GlassesOpticsOptical telescope

Question 6: ________ (LVEM)
NanoparticleHistologyLow voltage electron microscopeTransmission electron microscopy

Question 7: This goal was achieved in September 1933, using images of ________, which were quickly acquired before being damaged by the electron beam.

Question 8: It had earlier been recognized by Plücker in 1858 that the deflection of "cathode rays" (________) was possible by the use of magnetic fields.

Question 9: Additionally, ________ can cause the electrons to be deflected through a constant angle.
Lorentz forceElectric fieldMaxwell's equationsMagnetic field

Question 10: Developments into ________ (UV) microscopes, led by Koehler, allowed for an increase in resolving power of about a factor of two.
Visible spectrumElectromagnetic spectrumUltravioletX-ray


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