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Saturday, February 26, 2011

Optical Clock (part 2)

The optical clock are already having an impact in the field of global positioning systems or GPS. GPS satellites track planes, ships and car. GPS devices receive microwaves signal sent by satellites and, by measuring the time these take to arrive, can actually pinpoint the location of an object within 10 meters anywhere on the surface of the earth. However, by installing optical clocks on satellites, scientists are able to increase the level of accuracy to less than a metre. Such extraordinary precision may eventually lead to passengers planes landing safely on autopilot aided by precise measurements sent by satellite. Similarly, satellites armed with optical clocks may one day guide fully automated cars safely through busy motorway traffic and crowded city streets!


Accurate time measurement is also essential to the effective working of  the Internet which functions through globally shared time and frequency standards. Optical clocks can also assist in better tracking of deep space probes that travel across vast distances towards the stars. Scientists also believes that satellites armed with optical clocks will one day map the world's ice caps and mountain ranges with total accuracy. This may prove  especially important in helping us to understand the impacts of climate change.


Significantly, the same satellites can also monitor the slightest tremor or shake in the world's earthquakes long enough in advance for people to leave an area before disaster hits.


In the area of pure research, many scientists are even beginning to wonder whether optical clocks can help them test the most basic laws of physics. As one physicist at the National Institute of Standards and Technology points out, " We may one day test the basic properties of the cosmos. We may be able to an accuracy where perhaps we may start seeing changes in the basic laws of physics. It is a strange thing to wrap your mind around. We haven't seen anything like this yet, but it is exciting to look for."


So watch out! With the development of the new optical clocks, physics and the world of the future just got a whole lot more interesting.

See related links for more information :

http://physicsworld.com/cws/article/print/22097
http://www.nist.gov/public_affairs/releases/mercury_atomic_clock.htm

4 comments:

  1. oowh.begitu.baru ku tahu http://www.geekintherainbow.blogspot.com/

    ReplyDelete
  2. Gila ah! Reminded me of the world is really comin to an end -.- brr

    ReplyDelete
  3. sungguh berilmu blog saudari
    hehheheh

    ReplyDelete
  4. Ifa Athirah : hihi...bru taw ehh...okayy...

    Wan Fakhrul Rin :haha...dunia akhir zaman kan...

    Kerja kosong : thanx...blog ni kan dah title dy untuk berkongsi ape-ape sje yg sy nk kongsi...hihi

    ReplyDelete