GALILEAN RELATIVITY 1
Special relativity implies that moving clocks run slow. That is itself a strange result, but clocks running backward would be too much to swallow. No such disaster arises, however. In the case of the moths, …
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A HISTORICAL DIVERSION BY STEVEN WEINBERG 1
The writing history is largely a process of diversion, Most historical accounts distract attension from the secret influences behind great events.
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FIRST THREE MINUTES 1
We are now prepared to follow the course of cosmic evolution through its first three minutes. Events move much more swiftly at first than later, so it would not be useful to show pictures spaced …
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THE POSSIBILITY OF A “FINITE” AND YET “UNBOUNDED” UNIVERSE
In the first place, we imagine an existence in two-dimensional space. Flat beings with flat implements, and in particular flat rigid measuring-rods, are free to move in a plane. For them nothing exists outside of …
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COSMOLOGICAL DIFFICULTIES OF NEWTON’S THEORY
This conception is in itself not very satisfactory. It is still less satisfactory because it leads to the result that the light emitted by the stars and also individual stars of the stellar system are …
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THE SOLUTION OF THE PROBLEM OF GRAVITATION ON THE BASIS OF THE GENERAL PRINCIPLE OF RELATIVITY
If we confine the application of the theory to the case where the gravitational fields can be regarded as being weak, and in which all masses move with respect to the co-ordinate system with velocities …
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PHYSICAL MEANING OF GEOMETRICAL PROPOSITIONS BY ALBERT EINSTEIN
It is not difficult to understand why, in spite of this, we feel constrained to call the propositions of geometry “true.” Geometrical ideas correspond to more or less exact objects in nature, and these last
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Speeding :: Light
Albert Einstein: "The important thing is not to stop questioning. Curiosity has its own reason for existing. One cannot help but be in awe when he [or she] contemplates the mysteries of eternity, of life, …
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First Solvay Conference on Physics
The Solvay International Conferences on Physics, held every few years, are noted for their role in stimulating advances in atomic and quantum physics and were originally sponsored by Ernest Solvay (1838–1922), a Belgian industrial chemist …
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A Brief History of Cosmology and Galaxy Formation 1
Newton agreed with Bentley that providence had designed a universe of infinite extent in which uniformly distributed stars stand poised in unstable equilibrium like needles on their points (Harrison, 1987).
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EPILOGUE: THE PROSPECT AHEAD
During at least the early part of the contracting phase, astronomers (if there are any) will be able to amuse themselves by observing both red shifts and blue shifts. Light from nearby galaxies would have …
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Quantum particles :: When photons spice up the energy levels of quantum particles
Quantum particles :: When photons spice up the energy levels of quantum particles
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One child, one teacher, one book, one pen can change the world.
---Malala Yousafzai
If you judge people, you have no time to love them
----Mother Teresa