What does dark-field microscopy mean?
Definitions for dark-field microscopy
dark-field mi·croscopy
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Wikipedia
Dark-field microscopy
Dark-field microscopy (also called dark-ground microscopy) describes microscopy methods, in both light and electron microscopy, which exclude the unscattered beam from the image. As a result, the field around the specimen (i.e., where there is no specimen to scatter the beam) is generally dark. In optical microscopes a darkfield condenser lens must be used, which directs a cone of light away from the objective lens. To maximize the scattered light-gathering power of the objective lens, oil immersion is used and the numerical aperture (NA) of the objective lens must be less than 1.0. Objective lenses with a higher NA can be used but only if they have an adjustable diaphragm, which reduces the NA. Often these objective lenses have a NA that is variable from 0.7 to 1.25.
Numerology
Chaldean Numerology
The numerical value of dark-field microscopy in Chaldean Numerology is: 6
Pythagorean Numerology
The numerical value of dark-field microscopy in Pythagorean Numerology is: 8
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"dark-field microscopy." Definitions.net. STANDS4 LLC, 2024. Web. 6 May 2024. <https://www.definitions.net/definition/dark-field+microscopy>.
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