Eye to Eye With Einstein
Four Talks at the Chapel
Hill Public Library in Celebration of
Einstein's 1905 Papers on Relativity, Photons, and
Brownian Motion.
Professor Henry Greenside
Duke University
hsg@phy.duke.edu
When asked who is or was the most famous scientist of
all time, many people will mention Albert Einstein but
few people know what he did that made him so famous or
realize what a great impact his ideas continue to have
on our 21st-century lives. In three non-technical
presentations, Professor Greenside will talk about
Einstein's three great scientific papers of 1905
and why they are still vital and important 100 years
after they were published. In a later fourth talk, he
will discuss Einstein's greatest achievement, his 1916
theory of gravity known as the general theory of
relativity. The talks will include science
demonstrations and will leave plenty of time for
questions and discussion.
These talks were sponsored by the Friends
Organization of the Chapel Hill Library, with
special thanks to the Friends' president, Patsy
Saylor. The talks are part of the outreach program of
Duke University's
Physics Department, and are especially a
celebration of The World Year of
Physics 2005, in honor of this 100th year since
Einstein published his five famous papers of 1905.
If you have questions about the lectures or would like
to learn more about topics related to the lectures,
feel free to send an email to Professor Greenside at hsg@phy.duke.edu.
Lecture I on Special Relativity and
E=mc2
This talk will discuss Einstein's relativity theories
and its crazy but established consequences such as time
slowing down and lengths contracting when an object
moves quickly, that time travel into the future is
possible (and has been accomplished), and that a small
amount of matter can be converted into an enormous
amount of energy and vice versa.
- The October 2 PowerPoint lecture file (18
megabytes) can be downloaded here.
- Some related Internet links:
-
Einstein's Big Idea, PBS television show on
Tuesday, October 11. The website has some nice graphics
and interactive tutorials.
-
Seeing Relativity, computer simulations by
Australian researchers that give a sense of what the
world looks like when moving at relativistic speeds.
- A direct test
of E=mc2, recent Nature article
by Simon Rainville and collaborators (Nature,
Vol. 438, pages 1096-1097 (2005)) represents the
most accurate test to date of Einstein's most famous
equation. The paper shows that the equation holds to a
relative accuracy of 0.00004%; scientists are still
exploring the correctness of this equation.
Lecture II on the Photon Concept
What is light? In 1905, Einstein made a radical
proposition that light was not waves moving through
some kind of medium like water but particles called
"photons" that had wave-like features. This talk will
explain how Einstein's suggestion of photons was the
beginning of a scientific revolution called quantum
mechanics that has greatly changed our understanding of
what is matter and light and has become the deepest and
most accurate scientific theory the human race has yet
developed.
- The October 9 PowerPoint lecture file (24
megabytes) can be downloaded here.
- Six Easy Pieces: Essentials of Physics
Explained by Its Most Brilliant Teacher by Richard
Feynman (Perseus Books Group, 1996). Chapter 6 of
this book is the place to turn to for a good discussion
of the implications of the two-slit experiment for
understanding the quantum mechanics of light and
matter.
Lecture III on Brownian Motion and the Existence
of Atoms
What is the world made of? The ancient Greeks thought
substances were made of indivisible atoms but
scientists were unable to confirm their existence until
Einstein, in 1905, came up with a brilliant suggestion
about how to prove their existence, by examining
so-called Brownian motion, the endless jittering of
pollen grains in a droplet of water. Brownian motion
has since become a metaphor for many complex patterns
in space and time including financial time series and
the fractal shapes of mountains and clouds. The
existence of atoms has, in turn, provided the
foundation for much of modern science, especially
biology.
- The October 23 PowerPoint lecture file (18
megabytes) can be downloaded here.
-
American Institute of Physics article about
Einstein and Brownian motion.
- January 2005 Physics World
article about Einstein and Brownian motion.
- Chapter 1 of the book Six Easy Pieces by
Richard Feynman (Perseus Books Group, 1996) has a very
good non-technical discussion about the atomic
hypothesis and how it provides many valuable insights
into physics, chemistry, and biology. The same chapter
is available in Volume I of Feynman's Lectures
On Physics.
- "The Elements," song by Tom Lehrer
MP3 and
the lyrics.
Written when Lehrer was a graduate student of
mathematics at Harvard in the 1960s, in which he put
all the names of the elements together to the tune of
Gilbert and Sullivan's "I Am The Very Model of a Modern
Major-General".
Lecture IV on Einstein's Theory of General Relativity: Black
Holes, The Big Bang, and the Ultimate Computer
Einstein's most spectacular achievement as a scientist
was his 1916 general theory of relativity which
explained gravity as a geometric bending of spacetime
by matter. This talk will give a non-technical overview
of the general theory and then explain some of its
amazing implications such as the bending of light by
gravity, how strong gravitational fields cause time to
slow down, the properties of black holes that form when
massive stars die, and how space itself can expand and
contract. Dr. Greenside will then discuss how general
relativity is being used by scientists to understand
many mysterious astronomical observations: that there
seem to be monstrous black holes at the center of each
galaxy, that the universe is expanding at an ever
faster rate, and that most of the universe consists of
a mysterious "dark matter" whose properties seem to be
utterly different than what we are made of on
Earth. The talk will conclude with the observation that
physics is faced with a major crisis because our two
greatest physical theories, general relativity and
quantum mechanics, conflict with one another. The
resolution of this crisis is likely to lead to insights
even more spectacular than those of general relativity.
- The January 8 PowerPoint lecture file (43
megabytes) can be downloaded here.
-
87 Frequently Asked Questions about Black Holes at
the Astronomy Cafe.
-
Virtual trips to black holes and neutron stars.
-
Tutorial on dark matter.
-
NASA lunar "feather-drop" home page, discussing and
showing movie of David Scott dropping hammer and
feather at same time on surface of Moon, confirming
Galileo's claim that objects fell independently of
their mass or chemical properties.
- Seth
Lloyd's article on "Ultimate physical limits to
computation," how a knowledge of special
relativity, general relativity, and quantum mechanics
suggest that the human race is not even close to
achieving the maximum amount of computation that can be
extracted from a laptop-size computer. But to achieve
the ultimate (serial) computer, you need to crush it
into a black hole and heat it to temperatures
comparable to those that existed at the early stages of
the Big Bang.
- Some related books:
- Big Bang: The Origin Of The Universe by
Simon Singh (Fourth Estate, 2005).
- Black Holes & Time Warps by Kip Thorne
(W. W. Norton & Company, 1994).
Some Recommended Books:
- Simply Einstein: Relativity
Demystified by Richard Wolfson (W. W. Norton,
2003). A non-technical non-mathematical book about
special and general relativity. This is probably the
best book for most people to look at if they want to
learn more after the lectures.
- The New World of Mr. Tompkins by George
Gamow and Russell Stannard (Cambridge University Press,
1999). A non-technical and humorous classic that
introduces the reader to relativity, quantum mechanics,
and other topics of 20th-century physics.
- Einstein in Berlin by Thomas Levenson
(Bantam Books, 2003). A look at Germany through the
eyes of Einstein from 1914 to 1932, some science but
also much interesting culture and history also.
- The End of Science: Facing the Limits of
Knowledge in the Twilight of the Scientific Age by
John Horgan (Little Brown & Company, 1997, New
York). Will science continue to make significant
discoveries arbitrarily far into the future or will
science come to an end, where the basic principles of
all phenomena become known? This books takes the
controversial view that science will come to an end and
is likely in its twilight now.
- Return From the Stars by Stanislaw Lem
(Harvest, 1989). A science fiction book by someone that
many people regard as one of the great 20th century
science fiction writers. The book gives an
extraordinary sense of the culture shock that a group
of astronauts face when they return 130 years into
Earth's future while only having aged a decade
themselves because of relativistic time dilation.
- Einstein 1905: The Standard of Greatness by
John S. Rigden (Harvard University Press, 2005). A
short and somewhat technical book written to coincide
with the 2005 celebration of Einstein's papers. The
book gives a valuable sense of how scientists reacted
to Einstein's papers and the intellectual context at
the time Einstein's 1905 papers were published.
Henry
Greenside's home page
Department of Physics