Encyclopedia > U > Ultramicroscope
Ultramicroscope
The ultramicroscope is a system of illumination for extremely small objects such as colloidal particles, fog droplets, or smoke particles. The objects are held in liquid or gaseous suspension in an enclosure with an intensely black background (usually a black body) and illuminated with a convergent pencil of very bright light entering from one side and coming to focus in the field of view — the "Tyndall cone" familiar in experiements on scattering.
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