| dark-field microscope |
A microscope (device used to magnify small objects) in which objects are lit at a very low angle from the side so that the background appears dark and the objects show up against this dark background.
Ãâó: www.seniormag.com/conditions/cancer/cancerglossary...
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| dark adaptation |
Dark adaptation consists of the physical and chemical changes in your eyes that allow them to see well in the dark. Physically, the pupils of the eyes open wider (this happens quickly); chemically, slower changes occur in the eyes (which takes 10-20 minutes). It takes about 20 minutes for your eyes to completely adapt to darkness. Once your eyes become accustomed to the dark, even a momentary flash of white light can ruin it and your eyes will have to adapt all over again. ...
Ãâó: www.enchantedlearning.com/subjects/astronomy/gloss...
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| darkroom |
"Dark," light-tight space for processing and printing photographic materials, using safe-lighting suitable for the materials in use.
Ãâó: www.startphoto.com/learn/glossary/glossary_d-dh.ht...
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| dark adaptation |
The adjustment of the eyes that occurs over time when one enters a darkened area. This adjustment permits the eye to see better in the dim lighting conditions.
Ãâó: www.ndt-ed.org/GeneralResources/Glossary/letter/d....
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| dark adaptation |
Ability of the eye to adjust itself to a low level of illumination.
Ãâó: www12.mawebcenters.com/coltslaboratories/gloss.ivn...
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