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2. Stereo microscope - Wikipedia

   en.wikipedia.org/wiki/Stereo_microscope

   The stereo, stereoscopic or dissecting microscope is an optical microscope variant designed for low magnification observation of a sample, typically using light reflected from the surface of an object rather than transmitted through it. The instrument uses two separate optical paths with two objectives and eyepieces to provide slightly ...

3. Microscopy - Wikipedia

   en.wikipedia.org/wiki/Microscopy

   Antonie van Leeuwenhoek (1632–1723). The field of microscopy (optical microscopy) dates back to at least the 17th-century.Earlier microscopes, single lens magnifying glasses with limited magnification, date at least as far back as the wide spread use of lenses in eyeglasses in the 13th century [2] but more advanced compound microscopes first appeared in Europe around 1620 [3] [4] The ...

4. High-power field - Wikipedia

   en.wikipedia.org/wiki/High-power_field

   The area provides a reference unit, for example in reference ranges for urine tests. [3]Used for grading of soft tissue tumors: Grading, usually on a scale of I to III, is based on the degree of differentiation, the average number of mitoses per high-power field, cellularity, pleomorphism, and an estimate of the extent of necrosis (presumably a reflection of rate of growth).

5. Optical microscope - Wikipedia

   en.wikipedia.org/wiki/Optical_microscope

   The optical microscope, also referred to as a light microscope, is a type of microscope that commonly uses visible light and a system of lenses to generate magnified images of small objects. Optical microscopes are the oldest design of microscope and were possibly invented in their present compound form in the 17th century.

6. Magnification - Wikipedia

   en.wikipedia.org/wiki/Magnification

   With any telescope, microscope or lens, a maximum magnification exists beyond which the image looks bigger but shows no more detail. It occurs when the finest detail the instrument can resolve is magnified to match the finest detail the eye can see. Magnification beyond this maximum is sometimes called "empty magnification".

7. Condenser (optics) - Wikipedia

   en.wikipedia.org/wiki/Condenser_(optics)

   At high magnification, a condenser makes borders less marked, and is generally preferable in such cases. An example of a situation where microscopy without condenser is preferable at high magnification is the evaluation of crystals ( calcium pyrophosphate dihydrate crystal deposition disease pictured).

8. Holiday travelers are facing flight cancellations as severe ...

   www.aol.com/news/holiday-travelers-facing-flight...

   Holiday travelers setting out for what is expected to be one of the busiest travel weekends of the year are already facing delays as a severe round of storms rolls into the Southern US.

9. Digital microscope - Wikipedia

   en.wikipedia.org/wiki/Digital_microscope

   Thus the magnification number of a stereomicroscope is usually 40% less than the magnification number of a digital microscope. [citation needed] Since the digital microscope has the image projected directly on to the CCD camera, it is possible to have higher quality recorded images than with a stereo microscope. With the stereo microscope, the ...