category: review
TSAKANIN KWAKWALWA DA ZUCIYA 2
Zuciyar dan adam na gudanar da ayyuka masu dimbin yawa wadanda har yanzu malaman kimiyyar halittar jikin dan adam sun kasa tantance adadinsu. Abin da ake ta yi dai shi ne bincike, har zuwa wannan …
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TSAKANIN KWAKWALWA DA ZUCIYA 1
A wajen malaman kimiyyar halittar dan adam, kamar yadda muka gani, tunanin dan adam na samuwa ne ta hanyar kwakwalwarsa. A takaice ma dai suna ganin kwakwalwar dan adam ne ke sarrafa sauran bangarorin jikinsa …
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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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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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The Physics of Sound 1
Sound lies at the very center of speech communication. A sound wave is both the end product of the speech production mechanism and the primary source of raw material used by the listener to recover …
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Impossible is just a big word thrown around by small men who find it easier to live in the world they’ve been given than to explore the power they have to change it. Impossible is not a fact. It’s an opinion. Impossible is not a declaration. It’s a dare. Impossible is potential. Impossible is temporary. Impossible is nothing.
---Muhammad Ali
One child, one teacher, one book, one pen can change the world.
---Malala Yousafzai