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Arrow of Time
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Physics News
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Spontaneous Inflation and the Origin of the Arrow of Time
Microscopic laws of physics are essentially time-reversal invariant, but macroscopic thermodynamics exhibits a profound time-asymmetry; entropy typically increases in closed systems. This intriguing feature of the real w...
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Time travel
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1 Time travel (1 of 3) Click to Play | View Details
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Space-time
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Sound waves in a fluid behave uncannily like light waves in space. Black holes even have acoustic counterparts.
Could spacetime literally be a kind of fluid, like the ether of pre-Einsteinian physics?
When Albert Einstein proposed his special theory of relativity in 1905, he rejected the 1...
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optical lattice clock
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A clock 1000 times more accurate than any of its predecessors has set another benchmark, and could even be used to create a more precise definition of how long a second is.
The new clock is a variant on the atomic clocks that appeared in the 1950s. Atomic clocks usually work by measuring the frequency...
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Atomic clock is 50
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The time-keeping device that governs all aspects of our lives, the atomic clock, is celebrating its 50th year.
The first atomic clock, which uses the resonance frequencies of atoms to keep extremely precise time, was born at the UK's National Physical Laboratory.
Atomic clocks for...
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Astronomy Clock
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Astronomy Clock, Prague, Czech Republic Click to Play | View Details
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Greenwich Prime Meridian
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[url=http://news.bbc.co.uk/1/low/magazine/8266883.stm]R...
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TIME
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In this four-programme series, string theory pioneer Michio Kaku goes on an extraordinary exploration of the world in search of time. He discovers our sense of time passing and the clocks that drive our bodies. He reveals the forces of time that make and destroy us in a lifetime. He journeys to some of...
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leap second 2005
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To make up for the slowing down of the Earth's rotation, an extra second will be added to 2005.
The “leap second" is the first in seven years and reflects the variation in the Earth's rotation. For the first time since 1998, the International Earth Rotation and Reference Systems Service (IERS[/...
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