No galu . Not outer wall reflection . I am talking about bending light with graded index with respect to radius . So that the reflective index change with increased radius . Just like gravity change with respect to distance.
That's like a natural law! Endlessly frustrating with all this "internal reflection" going about. Navel watching should be banned!
Yes, I realised you were talking about the progressive bending of light when travelling through a medium of changing refractive index.
I simply gave a proven alternative way of trapping light in a sphere.
What you suggest is similar to the way that light bends in the formation of a superior mirage where the light bends as it travels towards warmer, less dense air.
For your idea to work, you would need the curvature of the bending to match that of a sphere, and I'm not sure of the practicalities of that.
Do you have any further information or illustration?
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To infinity and beyond perhaps. How would I know?
Are you serious? You're asking your old avian friend how photons travel?!
Watch this teenage scientist elegantly explain quantum tunnelling:
(What she says about electrons applies equally well to photons.)
She's Canadian by the way!
(What she says about electrons applies equally well to photons.)
She's Canadian by the way!
Sorry for being so abrupt, Pete. Your question was no doubt valid in your terms and may have elicited a definite answer if expressed more clearly to my ears. I hope the 'teen video' I supplied has helped you understand where the photons go.
P.S. I only said I "believe" that photons may escape total internal reflection through quantum tunnelling. Even my 'vaunted' googling skills have been of little help in clarifying that supposition to my satisfaction! 🙁
P.S. I only said I "believe" that photons may escape total internal reflection through quantum tunnelling. Even my 'vaunted' googling skills have been of little help in clarifying that supposition to my satisfaction! 🙁
They told me Dark matter exists everywhere, and that Dark matter doesn't dilute as the Universe expands. Doesn't that also mean Dark Matter expands with the Universe. The Universe (in part) is expanding into Dark Matter
Hang on, I gotta look up the word 'vaunted'...
apart from the universe, my vocabulary has been exponentially expanded. Wait, hey, isn't that included??
okay, yer definitely a vaunted member here.
now back to that vid..
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Hi wasabii and welcome to the Dark Side! 😀
It's true that dark matter interacts gravitationally and, where gravity dominates, universal expansion does not occur.
Having said that, very little is known about dark matter, but it seems important to the formation of large scale structure in the universe.
In the absence of a link to this "anton vedio", how can anyone possibly give a considered response?!
About 6 min 50 s into the video, the commentator finally gets round to mentioning a new hypothesis called "cosmological coupling" which seeks to explain why the universe's black holes appear to be more massive than astrophysicists expected them to be.
Observations of the gravitational waves produced when two black holes collide show that many black holes are up to 2.5 times more massive than was thought to be the norm, and astrophysicists can't explain these results on their current understanding of the formation of black holes.
A new paper published in November last year proposes that black holes don't only get more massive by merging with each other, but that their masses are somehow "cosmologically coupled" to the expansion of the universe i.e. the more the universe expands, the more massive black holes become!
The hypothesis (and it is just a hypothesis!) further suggests that "cosmological coupling" applies to all material objects in the universe, even we human beings! In our case, however, the coupling is so weak that we cannot see its effects. So, if you've put on a few pounds recently, you can't blame it on "cosmological coupling"! 😆
A new record has been set for the energy produced in a sustained nuclear fusion reaction.
Researchers at the Joint European Torus (JET) in Oxfordshire, UK have generated 59 megajoules of heat during a 5 second burst of fusion.
This is roughly equivalent to the energy required to run a kettle in normal use for two months - or about 14kg of TNT.
This more than doubles the previous record of 21.7 megajoules set in 1997 by the same facility.
The ultimate destination is still a long way off, but this is a significant step on the way!
Researchers at the Joint European Torus (JET) in Oxfordshire, UK have generated 59 megajoules of heat during a 5 second burst of fusion.
This is roughly equivalent to the energy required to run a kettle in normal use for two months - or about 14kg of TNT.
This more than doubles the previous record of 21.7 megajoules set in 1997 by the same facility.
The ultimate destination is still a long way off, but this is a significant step on the way!
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