dark ground illumination
- noun
- Specialized
:
iluminación de fondo oscuro
- In microscopy, dark ground illumination enhances the visibility of transparent specimens.
Examples
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Many transparent specimens can be visualized clearly only with dark ground illumination.
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Researchers observed the cells under dark ground illumination to highlight their movements.
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The presence of live spirochetes was confirmed using dark ground illumination.
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Have you ever used dark ground illumination in your experiments?
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In microscopy, dark ground illumination allows scientists to see otherwise invisible details in transparent samples.
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The researchers utilized dark ground illumination to enhance the contrast of the delicate structures in the specimen.
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By employing dark ground illumination, the team successfully visualized the movement of microorganisms against a dark background.
Synonyms
1
6.8
A microscope that makes tiny particles too small for an ordinary microscope appear bright on a dark background
A way of lighting a sample under a microscope to make tiny things look bright against a dark background
Surface Forms
Morphology
dark + ground + illumination
The compound clearly combines 'dark' + 'ground' + 'illumination', so a learner can plausibly infer it refers to a kind of lighting that produces a dark background against which things are seen. However, 'ground' = 'background' in imaging and the precise microscopy technique (dark-ground/dark-field illumination and its use of scattered light) are technical and domain-specific, so the full, precise meaning is not fully predictable to an average B1 learner.
Etymology
Dark ground illumination comes from what you see under a microscope: the tiny specimen shines while the dark ground is the black 'background', because the light comes from the side so only the object looks bright. That's why illumination here means 'lighting' that makes things appear bright against a dark background.