See Also: zinke(dictionary)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
virtual(dictionary)
virtual(dictionary)
image virtual(medicine)
virtual reality(encyclopedia)
virtual focus(medicine)
virtual office(dictionary)
virtual reality(dictionary)
Virtual airport(tourism)

virtual image (medicine) and zinke (iou)


virtual image (medicine)


virtual image
<microscopy> Such as seen in a mirror or through a magnifier. A virtual image has no real existence in space as does a real image from a lens. It does have a definite location, however, caused by the angles of divergence of the rays received by the eye. This can be shown by the common school experiment of placing a pin coincident with its mirror image behind a sheet of glass acting as a partial mirror. Its location can also be placed in design by extrapolating backwards to a focus. If a magnifier is used as it should be, with the object at its focus, the virtual image is at infinity. The same is true for a microscope focused for the relaxed eye.

See: distance of virtual image.


zinke (iou)



zinke noun. Also zink. L18.
[German.]
Music (now Hist.). A musical instrument of wood or horn, similar to or identical with a cornett and common in 17th- and 18th-cent. Europe. Also, a loud reed-stop in an organ.