MOTION MOUNTAIN

ibliography 369
86 The beautiful RGB Color Atlas from 2011 by Tauba Auerbach is presented on her astonishing
website at taubaauerbach.com/view.php?id=286&alt=698.The books were produced
together with Daniel E. Kelm. In fact, they produced three such books, with spines in different
directions, as shown on the website. Cited on page 125.
87 This famous discovery is by Brent Berlin & Paul Kay, Basic Color Terms: Their UniversalityandEvolution,
University of California Press, 1969.The status of their decades-long
worldcoloursurvey is summarized on www1.icsi.berkeley.edu/wcs. Of course there are also
ongoing studies to find possible exceptions; but the basic structure is solid, as shown in
theconferenceproceedingsC.L. Hardin&Luisa Maffi,ColourCategoriesinThought
andLanguage, Cambridge UniversityPress,1997. Cited onpage126.
88 For a thorough discussionof the various velocities connected to wave trains, see the classic
text by Louis Brillouin, Wave Propagation and Group Velocity, Academic Press,
New York, 1960. It expands in detail the theme discussed by Arnold Sommerfeld,
Über die Fortpflanzung des Lichtes in dispergierenden Medien, Annalen der Physik,
4th series, 44, pp. 177–202, 1914. See also Arnold Sommerfeld, Optik, Dietrichssche
Verlagsbuchandlung, Wiesbaden 1950, section 22. An English translation
Arnold Sommerfeld, Lectures on Theoretical Physics: Optics, 1954, is also available.
Cited onpages 130and131.
89 Changing the group velocity in fibres is now even possible on demand, as shown by
M. González-Herráez,K.-Y. Song&L. Thévenaz,Opticallycontrolledslowand
fast light in optical fibers using stimulated Brillouin scattering, Applied Physics Letters 87,
p.081113,2005. They demonstrategroup velocities from0.24c toplus infinityandbeyond,
tonegativevalues.
Anotherexperiment wascarried out byS. Chu & S. Wong, Linear pulse propagation
in an absorbing medium, Physical Review Letters 48, pp. 738–741, 1982. See also S. Chu
& D. Styer, Answer to question #52. Group velocity and energy propagation, American
Journal of Physics 66, pp. 659–661, 1998. Another example was described in 1993 by
the group of Raymond Chiao for the case of certain nonlinear materials in R. Chiao,
P.G. Kwait & A.M. Steinberg, Faster thanlight?,ScientificAmerican 269,p.52,August
1993, and R.Y. Chiao, A.E. Kozhekin & G. Kurizki, Tachyonlike excitations
in inverted two-level media, Physical Review Letters 77, pp. 1254–1257, 1996. On still another
experimental set-up using anomalous dispersion in caesium gas, see L.J. Wang,
A. Kuzmich & A. Dogarin, Gain-assisted superluminal light propagation, Nature406,
pp.277–279,20July 2000. Cited onpage130.
90 G. Nimtz, A. Enders & H. Spieker, Journal de Physique I (Paris) 4, p. 565, 1994.
Unfortunately, Nimtz himself seems to believe that he transported energy or signals
faster than light; he is aided by the often badly prepared critics of his quite sophisticated
experiments. See A. Enders & G. Nimtz, Physikalische Blätter 49, p. 1119, Dezember
1993, and the weak replies in Physikalische Blätter 50, p. 313, April 1994. See also
A.M. Steinberg, Journal de Physique I (Paris) 4, p. 1813, 1994, A.M. Steinberg,
P.G. Kwiat & R.Y. Chiao, Physical Review Letters 71, pp. 708–711, 1993, and
A. Ranfagni, P. Fabeni, G.P. Pazzi & D. Mugnai, Physical Review E 48, p. 1453,
1993. Cited onpage132.
91 Y.P. Terletskii,ParadoxesintheTheoryofRelativity,PlenumPress,1968.Citedonpage
131.
92 SeetheexcellentexplanationbyKirk T. McDonald, Negativegroupvelocity,American
JournalofPhysics69,pp.607–614,2001. Cited onpage131.
93 AsummaryofallevidenceaboutthemotionoftheaetherisgivenbyR.S. Shankland,
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