Assertion: microscope's specimen | /r/HasProperty | illuminated
Facets:
value: evenly
type: DEGREE
value: by light
type: OTHER
value: by a beam of electrons
type: OTHER
value: in the electron microscope
type: LOCATION
Source sentences:
text: The resolution of a light microscope is determined by a numerical aperture of its lens system and by the wavelength of the light it employs; a numerical aperture a definition of the light wavelengths produced when the specimen is illuminated.
text: In the electron microscope, the specimen is illu-minated by a beam of electrons rather than light, and the focusing is carried out by elec-tromagnets instead of a set of optics.
text: If the lamp filament has been properly adjusted, the specimen should be evenly illuminated regardless of the fine focus state, condenser height, or field diaphragm opening size.
text: Hence most specimens need to be illuminated, particularly at higher magnifications, when observing details that are so small that they reflect only small amounts of light.
text: Since the specimen will still need to be illuminated and held in the proper placement, a traditional-style setup is generally preferred for quality images to be obtained.