Skip to comments.How to see quantum gravity in Big Bang traces
Posted on 09/30/2013 11:28:55 PM PDT by LibWhacker
The cosmic microwave background sky, here mapped by NASA's Wilkinson Microwave Anisotropy Probe, has a polarization, represented by white bars. Future experiments might measure the polarization with enough sensitivity to prove the existence of gravitons, the quanta of gravity.
Can a quantum of gravity ever be detected? Two physicists suggest that it can using the entire Universe as a detector.
Researchers think that the gravitational force is transmitted by an elementary particle called the graviton, just as the electromagnetic force is carried by photons. But most of them despair about ever recording individual gravitons. That is because gravity is so weak that any interactions between gravitons and matter are thought to be beyond human ability to detect in the foreseeable future.
Some physicists, including Freeman Dyson at the Institute for Advanced Study in Princeton, New Jersey, have gone further and claimed that building a graviton detector may actually be physically impossible. Several kinds of detectors have been proposed, but they would fail owing to a combination of instrumental and quantum noise, Dyson said at a conference in Singapore last month in honour of his 90th birthday.
(Excerpt) Read more at nature.com ...
Hold a pencil and drop it...Viola!!! a Gravitron.
Step 1) Take your pencil along with you to an amusement park.
Step 2) Buy some tickets.
Step 3) Find the spinning puke machine where the floor drops out from underneath your feet while you are left plastered to the wall.
Step 4) Hold out your pencil and try to drop it. It sticks to the wall right alongside you (probably after it hits you in the face).
Viola!!! No Gravitons needed to explain what happened.
The pencil will stay if it is against the wall bit drops to the floor if you hold it in front of you. Centripetal Force. Big Bang Theory 2009.
Your experiment will fail.
Someone is going to need to build a big box.
I don’t think I should respond until October 12. Which is, of course, the day after the Pink Floyd tribute bands rendition of Dark Side of the Moon laser light show xtravagonzo.
I guess it would work unless you had arms 10+ feet long and the pencil was close to the centered in the drum. The pencil would not have enough inertia to overcome the gravity drop of 32 feet per second per second and would hit the bottom of the drum. I guess then it would work its way to the side?
Yup. Now you’ve got it!
And, yes, it would quickly work its way to the side because the bottom of the Gravitron’s drum is also spinning.
BTW - I remember watching a kid puke in the Gravitron. The puke pooled up behind his head and stayed that way throughout the ride. Then, when the ride slowed down and gravity took over, it dripped all down his back. Not a pretty sight!
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