-
Vesuvianite jade.
Xanthite is a
manganese rich variety.
Wiluite is an
optically positive variety from Wilui, Siberia.
Idocrase is an
older synonym sometimes...
-
about 3.9 vs. 4.2) than rutile.
Anatase is also
optically negative,
whereas rutile is
optically positive.
Anatase has a more
strongly adamantine or metallic-adamantine...
-
makes a real lens with
identical curved surfaces slightly positive. To
obtain exactly zero
optical power, a
meniscus lens must have
slightly unequal curvatures...
- Gram-
positive bacteria take up the
crystal violet stain used in the test, and then
appear to be purple-coloured when seen
through an
optical microscope...
-
analysed with
optical emission spectrometry (OES) "
Positive Material Identification (PMI)". www.intertek.com.
Retrieved 13
January 2019. "
Positive Material...
- An
optical isolator, or
optical diode, is an
optical component which allows the
transmission of
light in only one direction. It is
typically used to prevent...
- for
optical power is the
inverse metre (m−1), which, in this case, is
commonly called the
dioptre (symbol: dpt or D).
Converging lenses have
positive optical...
- 1.544(2), and nz = 1.561(2). The
optical orientation is Y = b, Z:a = 14° (in
acute angle β). It is
optically positive with Δ = 0.029(l),
measured with...
- In optics,
aberration is a
property of
optical systems, such as lenses, that
causes light to be
spread out over some
region of
space rather than focused...
- an
optical system is a
measure of how
strongly the
system converges or
diverges light; it is the
inverse of the system's
optical power. A
positive focal...
