ultramicroscope
IPA: ʌɫtrʌmˈaɪkrʌskoʊp
noun
- a microscope that uses bright illumination against a black background to view small particles
Examples of "ultramicroscope" in Sentences
- An ultramicroscope is a system of illumination for viewing tiny particles.
- The ultramicroscope system is based on light scattering, not light reflection.
- As mentioned, there are colloids which are so fine-grained that their particles cannot be distinguished even in the ultramicroscope.
- He did this with the aid of an instrument, the ultramicroscope, which he had developed in collaboration with scientists at the Zeiss factory in Jena.
- This difficult problem was brought a decisive step nearer to its solution by the invention of the ultramicroscope at the beginning of the 20th century.
- He used Zsigmond's ultramicroscope to study the Brownian movement of colloidal particles, so named after the Scottish botanist Robert Brown, and confirmed
- By means of the ultramicroscope it has been possible to observe a similar, only much livelier movement with very much smaller particles of a colloidal nature.
- During this period he discovered how to prepare reproducibly gold hydrosols and also developed the slit-ultramicroscope in joint collaboration with Siedentopf.
- The persistent patience of microscopists and technical improvements like the "ultramicroscope" have greatly increased our knowledge of the invisible world of life.
- Zsigmondy now found that various gold colloids prepared by him contained delimited particles under the ultramicroscope although they had appeared completely homogeneous under an ordinary microscope.
- With the ultramicroscope, and especially the improved type which is called the immersion ultramicroscope, progress has been such that particles with a diameter of down to 8 mm are recognized with arc-light illumination, and down to 4 mm when using the sun as the light source.
- They blinked and faded like motes within a shifting sunbeam; or, to use a more scientific comparison, like colloids within the illuminated field of the ultramicroscope; and like these latter it was as though the eyes took in not the minute particles themselves but their movement only.