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Thread: The Official Cricketweb Science Thread!

  1. #1501
    International Coach PhoenixFire's Avatar
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    I was trying to explain to my Dad today what E=MC^2 actually meant, but soon realised that I didn't actually know enough about it to explain it in a reasonable manner. Could someone (SS/Spark most likely) explain what it actually means.
    Quote Originally Posted by Top_Cat View Post
    1) Had double pneumonia as a kid, as did my twin sis. Doctors told my parents to pray that we lived through the night. Dad said **** off, I'm an atheist, you ****s better save my kids, etc. Then prayed anyway.

  2. #1502
    The Wheel is Forever silentstriker's Avatar
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    At it's very basic level, e=mc^2 just shows that when you measure the mass of something, you are in fact measuring its energy and vice versa.

    So all energy has mass, and all mass has energy and you can convert between them using this formula.

    The relationship is simple and while others had postulated some link between the two before, it's not an obvious one (e.g why it should necessarily be so).

    (You may ask about photons not having any mass but yet having energy, but then e^2= p^2*c^2 + m^2*c^4 doesn't have the same ring ).
    Quote Originally Posted by KungFu_Kallis View Post
    Peter Siddle top scores in both innings....... Matthew Wade gets out twice in one ball
    "The future light cone of the next Indian fast bowler is exactly the same as the past light cone of the previous one"
    -My beliefs summarized in words much more eloquent than I could come up with

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  3. #1503
    Cricketer Of The Year Agent Nationaux's Avatar
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    Thanks for the explanation SS.
    Quote Originally Posted by BoyBrumby View Post
    Yeah, look, it gives me a pain deep inside my uterus to admit it, but it's Ajmal until such time as we get a working throwing law again.
    Never in a million years would I have thought Brumby to admit this!!!!!!

  4. #1504
    Global Moderator Spark's Avatar
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    Optical Quantum Memory
    To store a quantum state of light, you have to somehow catch it and release it, but never measure it. This is because any measurement will disturb the quantum state, thus making the memory noisy. We do experiments that aim to perfect a quantum memory that works by absorbing pulses of light in an atomic gas. At some controllable time later, we can un-absorb the light to release the stored quantum state. The are numerous projects available working on both hot and cold atomic gases, generating entangled quantum states of light, as well as theoretical modelling of the system.
    Looks like fun.
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  5. #1505
    Hall of Fame Member Howe_zat's Avatar
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    Like playing Grandma's Footsteps with photons.
    I'm always suspicious of shops that sell bait.

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    International 12th Man Quaggas's Avatar
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    Quote Originally Posted by PhoenixFire View Post
    I was trying to explain to my Dad today what E=MC^2 actually meant, but soon realised that I didn't actually know enough about it to explain it in a reasonable manner. Could someone (SS/Spark most likely) explain what it actually means.
    The principle of relativity/constancy of the speed of light (that's the crazy part) has odd consequences for the energy of light as viewed in different inertial reference frames. The connection to mass comes from looking at the change in energy of a stationary vs moving particle before and after emitting said light.

    Deatils were originally written up by some patent clerk in Bern.

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    The Wheel is Forever silentstriker's Avatar
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    International 12th Man Quaggas's Avatar
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    lol, $2 cable from radio shack. I guess they'll never want to work in this town again.

  9. #1509
    Request Your Custom Title Now! Flem274*'s Avatar
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    Quote Originally Posted by Athlai View Post
    Jeets doesn't really deserve to be bowling.
    Quote Originally Posted by Athlai View Post
    Well yeah Tendy is probably better than Bradman, but Bradman was 70 years ago, if he grew up in the modern era he'd still easily be the best. Though he wasn't, can understand the argument for Tendy even though I don't agree.
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    Global Moderator nightprowler10's Avatar
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    Quote Originally Posted by Flem274* View Post
    Or as WASP-17b likes to call it, bizarro world.
    RIP Craigos

  11. #1511
    Cricket Web: All-Time Legend Samuel_Vimes's Avatar
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    Quote Originally Posted by Flem274* View Post
    The word 'baffled' is usually a good sign of bogus science news.
    Messi scores on the rebound.

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    Quote Originally Posted by Adolf Grünbaum
    Is the conduct approved by the gods right ("pious"), because of properties of its own, or merely because it pleases the gods to value or command it?

  12. #1512
    Request Your Custom Title Now! Flem274*'s Avatar
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    So I learned today from a friend whose parents work in Natural Science at our uni that the professor who takes one of our papers has some fringe religious beliefs, like the earth is 600 years old (figure quoted from person in the know, but they probably meant 6000 since it fits in with creationism) and all that.

    Cue awkward moment when he says in class today "A few centuries ago, fossils and fluvial deposits were explained away as remnants of Noah's Flood," laughing as though he found the idea ludicrous. Some awkward glances were exchanged between me and some mates.

    This guy is a river geomorphologist. I have no idea how he can reconcile what he researches with his religious beliefs. I mean sure rivers aren't as challenging to his beliefs as say, the fossil record, but he's published papers on reconstructing where ancient rivers and estuaries were located and what they may have looked like.

    Anyone ran into similar people?

  13. #1513
    The Wheel is Forever silentstriker's Avatar
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    I have never met a young earth creationist in academia.

  14. #1514
    International 12th Man Quaggas's Avatar
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    People saying one thing, but (secretly) believing something else? Unheard of.

    Seriously, perhaps he was playing the devil's advocate for creationism? I've had a borderline right-wing nationalist very successfully argue the case for Marx et al, for example.

  15. #1515
    International Captain ankitj's Avatar
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    Icon5

    BBC News - 'Twisted' waves could boost capacity of wi-fi and TV

    I didn't fully follow the physics behind it but it sounds revolutionary. I studied telecommunications long ago and it seems to challenge its fundamentals. Can someone explain what's happening here?



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