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Negative-index
metamaterial or
negative-index
material (NIM) is a
metamaterial whose refractive index for an
electromagnetic wave has a
negative value...
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total internal reflection.: 49–50 This
occurs only when
going to a less
optically dense material, i.e., one with
lower refractive index. To get
total internal...
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gravity 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...
- lenses, and
negative for
diverging lenses. The
reciprocal of the
focal length, 1 f , {\textstyle \ {\tfrac {1}{\ f\ }}\ ,} is the
optical power of...
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resulting in
strong magnetic coupling. This can
produce a
negative index of
refraction in the
optical range.
Potential applications include cloaking and transformation...
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Negative pulldown is the
manner in
which an
image is
exposed on a film stock,
described by the
number of film
perforations spanned by an
individual frame...
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samples of
wulfenite that is pale-yellow in thin
sections and is
optically negative. It
crystallizes in the
tetragonal system, in the form of
square tabular...
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almandine spar, eudalite,
Saami blood.
Eucolite is the name of an
optically negative variety, more
accurately the
group member: ferrokentbrooksite. Eudialyte's...
- In art and design,
negative space is the
empty space around and
between the subject(s) of an image.
Negative space may be most
evident when the space...
- a
negative focal length indicates how far in
front of the lens a
point source must be
located to form a
collimated beam. For more
general optical systems...
