Skip to comments.
Light Can Twist as Well as Spin
NASA -- Astronomy Picture of the Day ^
| 11-19-03
| apod
Posted on 11/19/2003 3:30:55 AM PST by Boot Hill
click here to read article
Navigation: use the links below to view more comments.
first previous 1-20, 21-40, 41-60, 61-76 next last
To: BigLittle
BWa hahahhaah, pretty cool.
To: Amelia
I think you'll like this one. ;-)
22
posted on
11/19/2003 9:19:45 AM PST
by
Scenic Sounds
(Hoy, no tengo ningĂșn mensaje a compartir.)
To: Buckhead
Does this have any implications for the observed red shift upon which the Big Bang theory rests?
No, the red shift is based on a doppler shift (frequency shift) it has nothing to do with this.
To: Boot Hill
Like this?
To: Boot Hill
Warp Nine now, Mr. Data!
25
posted on
11/19/2003 9:29:21 AM PST
by
AxelPaulsenJr
(Excellence In Posting Since 1999)
To: edwin hubble
Thanks for the ping.
26
posted on
11/19/2003 9:32:44 AM PST
by
PatrickHenry
(Felix, qui potuit rerum cognoscere causas.)
To: RadioAstronomer; All
I can't get a handle on this. If we observe light with OAM, what are we supposed to conclude about it's origin? What does this data tell us? If this is going to be an astronomical tool, what do we use it for? (In case all of this is obvious, then break it to me gently.)
27
posted on
11/19/2003 10:45:06 AM PST
by
PatrickHenry
(Felix, qui potuit rerum cognoscere causas.)
To: RightWhale
Thanks for the promo, RightWhale! :-)
28
posted on
11/19/2003 1:02:53 PM PST
by
petuniasevan
(Kirk: Oh no! Ensign Pillsbury! Bones: He's bread Jim!)
To: Boot Hill
Light Can Twist as Well as Spin Holy Foot Candles Batman - Light has been taken over by the DemoncRATS!
29
posted on
11/19/2003 1:09:54 PM PST
by
N. Theknow
(Be a glowworm, a glowworm's never glum, cuz how can you be grumpy when the sun shines out your bum.)
To: richtig_faust
richtig_faust sez: "
I thought we knew that back in Maxwell's time."
Yes, it is amazing how all of man's discoveries about EM wave phenomena comport so exactly with Maxwell's equations.
--Boot
To: richtig_faust; Buckhead
richtig_faust sez: "
No, the red shift is based on a doppler shift (frequency shift) it has nothing to do with this."
You know, I almost answered Buckhead that way, but then I realized I was responding less to his specific question, than to where I sensed he seemed to be heading with his query (a short lifetime universe).
While it is true that the current state of science regarding the red shift is that it is due to Doppler shift, nonetheless, one would be taking an imprudent step to translate that "understanding" to a non-scientific limit of "proven and irrefutable".
Since the phenomenon described in the thread article is so new and there is so little understanding of how it would be created in nature, or how an existing "normal" light beam could be "twisted" or how twisted light could be detected, distinguished and observed, it might be more prudent to be a bit more circumspect in regards to such answers.
For instance, in #13 above, I present one possible scenario with "twisted" light that could account for an apparent lowering of its frequency like occurs with red shift. Could this account for the observed astronomical red shift? It's possible, but while I don't think so, I also believe that it is still too early just to give a blanket "No" to the question.
--Boot
P L A C E M A R K E R
32
posted on
11/19/2003 6:42:00 PM PST
by
PatrickHenry
(Felix, qui potuit rerum cognoscere causas.)
To: edwin hubble
Thanks for the ping :-)
To: PatrickHenry
I can't get a handle on this. If we observe light with OAM, what are we supposed to conclude about it's origin? What does this data tell us? I need to look at this closer.
To: maxwell; Physicist; VadeRetro; RightWhale
ping
To: ovrtaxt
Hey! Whadda ya think yer doin' sneakin' around in my backyard taken pitchers. There oughta be a law ...
36
posted on
11/19/2003 8:58:39 PM PST
by
MHGinTN
(If you can read this, you've had life support from someone. Promote life support for others.)
To: Boot Hill
Except for the fact that color is based on FREUQUENCY not momentum or force.
To: richtig_faust
richtig_faust says: "
Except for the fact that color is based on FREUQUENCY not momentum ..."
Your statement is incorrect. Frequency is intimately connected to the photon's momemtum because when a photon looses momentum, the result is a loss of energy. And the consequence of a photon losing energy, is a decrease in frequency, i.e., a red shift. See below.
momentum:
p = m*v
energy of a photon:
E = h*f = mc2
(where h = Planck's constant)
and by combining eq. 1 and eq. 2, we get the momemtum of a photon:
p = h*f/c
(where c = speed of light)
From eq. 3 it can be seen that if the photon's momentum (p) decreases, the frequency (f) must also decrease.
--Boot Hill
To: Boot Hill
I don't get any of this, but I did stay at a Holiday Inn Express last night.
To: Boot Hill
Anyone who lived through the disco era could have told them that.
40
posted on
11/20/2003 9:44:21 AM PST
by
rogers21774
(The guilty taketh the truth to be hard, for it cutteth them to the very center.)
Navigation: use the links below to view more comments.
first previous 1-20, 21-40, 41-60, 61-76 next last
Disclaimer:
Opinions posted on Free Republic are those of the individual
posters and do not necessarily represent the opinion of Free Republic or its
management. All materials posted herein are protected by copyright law and the
exemption for fair use of copyrighted works.
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson