46 results found for physics

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00:30:00

Powering the Future

by Robert Laughlin
Powering the Future
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 974 views
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Some seeds of what to do in the climate/energy controversy are contained in what will be.  In this talk I shall ask everyone to jump over contemporary politics and make a mental journey to a time, several centuries from now, when nobody uses carbon-....

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00:33:00

Spontaneous Ionization to Subatomic Physics: Some Vignettes from Cosmic Ray History

by James Cronin
Spontaneous Ionization to Subatomic Physics: Some Vignettes from Cosmic Ray History
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 749 views
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In 1879 Crookes discovered that air seemed to ionize spontaneously.  With the discovery in 1896 of radioactivity by Henri Becquerel it appeared that the mystery was solved.  However a number of physicists sought a quantitative agreement between the....

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00:34:00

The Quantum Mechanics of Light: Interference, Entanglement – and Ghosts

by Roy Glauber
The Quantum Mechanics of Light: Interference, Entanglement – and Ghosts
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 1043 views
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The early days of the quantum theory presented many dilemmas connected with interference phenomena and what we have come to call the entanglement of states. We are much better able to deal with these problems now, both in theory and experiment, but t....

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00:31:00

Five Decades of Lasers, Six Decades of Progress, and a Proposed Space Experiment to test Einstein’s Assumptions

by John Hall
Five Decades of Lasers, Six Decades of Progress, and a Proposed Space Experiment to test Einstein’s Assumptions
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 858 views
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Even though this is the 51st year of the Laser, progress in its control and application in precision measurements is still accelerating.  The Optical Frequency Comb technology exploded in 1999-2000 from the synthesis of advances in independent field....

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00:31:00

Laser Spectroscopy of Hydrogen

by Theodor Hänsch
Laser Spectroscopy of Hydrogen
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 1040 views
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The simple Balmer spectrum of atomic hydrogen has provided the Rosetta stone for deciphering the strange laws of quantum physics during the early 20th century.  Four decades ago, Doppler-free laser spectroscopy opened a new chapter in the exploratio....

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00:33:00

A Century of Quantum Mechanics

by David Gross
A Century of Quantum Mechanics
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 1474 views
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In October 2011 we celebrated the centenary of the Solvay conferences that played a unique and important role in the development of twentieth century physics, most notably in the quantum revolution whose birth overlapped the initiation of these meeti....

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00:30:00

The Real M-Theory

by Brian Josephson
The Real M-Theory
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 815 views
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How can one advance a working hypothesis that will not be wrong tomorrow and ridiculous the day after? Beyond the Standard Model we find uncertainty and confusion, with both unclarity as to which might be the correct theory, as well as little in the ....

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00:31:00

Creating Artificial Magnetic Fields to Act on Neutral Atoms

by William Phillips
Creating Artificial Magnetic Fields to Act on Neutral Atoms
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 1084 views
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Cold, quantum degenerate gases of neutral atoms have proved to be useful in simulating the behavior of quantum systems like electrons in solids.  For example, cold atoms moving in optical lattices (periodic potentials created by interfering laser be....

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00:31:00

Neutrinos: a Golden Field for Astroparticle Physics

by Carlo Rubbia
Neutrinos: a Golden Field for Astroparticle Physics
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 807 views
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Neutrinos have been the origin of an impressive number of ‘surprises’.  We know that neutrinos have tiny masses and that oscillations are occurring spontaneously between neutrino species.  But additional new discoveries may be ahead of us and t....

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00:34:00

The LHC at CERN and the Higgs

by Martinus Veltman
The LHC at CERN and the Higgs
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 961 views
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The strong interactions, the forces responsible for the interactions between quarks and notably supposedly responsible for quark confinement, profited from the development of gauge theories.  In the wake of the gauge theory of weak interactions also....

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