alpha2cen Posted June 2, 2012 Share Posted June 2, 2012 Are there any empty vacuum space through which light can not travel in the Universe? Do we have any information about it? Are there any Dark Matter which has such property? Link to comment Share on other sites More sharing options...
swansont Posted June 2, 2012 Share Posted June 2, 2012 Not that we know of. Light doesn't interact with dark matter except gravitationally (which is why it is dark), so DM would not be opaque. Link to comment Share on other sites More sharing options...
Airbrush Posted June 5, 2012 Share Posted June 5, 2012 Are there any empty vacuum space through which light can not travel in the Universe? Do we have any information about it? Are there any Dark Matter which has such property? Light has no problem traveling through a total vacuum. Link to comment Share on other sites More sharing options...
alpha2cen Posted June 7, 2012 Author Share Posted June 7, 2012 Light has no problem traveling through a total vacuum. How to make a total vacuum? Do we make a vacuum space which has no Casimir effect? Link to comment Share on other sites More sharing options...
Airbrush Posted June 7, 2012 Share Posted June 7, 2012 How to make a total vacuum? Do we make a vacuum space which has no Casimir effect? If you could make a total vacuum, light would pass thru it. Why not? Link to comment Share on other sites More sharing options...
swansont Posted June 7, 2012 Share Posted June 7, 2012 How to make a total vacuum? Do we make a vacuum space which has no Casimir effect? I don't think that's what Airbrush was implying. There's more than one definition of vacuum, and "complete absence of anything" is only one of them and isn't physically attainable. Since we're talking about real effects, I assume that real vacuums — the absence of real, massive particles — are what are being referred to. Light would have no problem traveling through such a vacuum. Link to comment Share on other sites More sharing options...
alpha2cen Posted June 8, 2012 Author Share Posted June 8, 2012 Let us think about Black Hole. Near Black Hole, Is it an empty space light can not travel? ----------Black Hole center ----------surface -------------------------------------------------------------------------------------------------------->radial direction ----------very high mass region(Black Hole) ------light can not travel region ---------light bending region ------------light no effect region Link to comment Share on other sites More sharing options...
Airbrush Posted June 8, 2012 Share Posted June 8, 2012 Let us think about Black Hole. Near Black Hole, Is it an empty space light can not travel? ----------Black Hole center ----------surface -------------------------------------------------------------------------------------------------------->radial direction ----------very high mass region(Black Hole) ------light can not travel region ---------light bending region ------------light no effect region Could the only total vacuum in the universe exist inside a black hole, the region between the event horizon and the singularity? Link to comment Share on other sites More sharing options...
alpha2cen Posted June 9, 2012 Author Share Posted June 9, 2012 (edited) Think about light bending and gravity. Intensity of Gravity...0------low--------------------------------------------------------------------------------------------------------------------------------------------------------------------------->high Related phenomena..-----no affected ------small bended ---highly bended----critical bending --What happen?(light speed increase? critical bending? other phenomena?)----> Edited June 9, 2012 by alpha2cen Link to comment Share on other sites More sharing options...
Aethelwulf Posted June 9, 2012 Share Posted June 9, 2012 First of all, there is no such thing as an empty space. I don't even think an empty space exists inside a black hole... Link to comment Share on other sites More sharing options...
alpha2cen Posted June 9, 2012 Author Share Posted June 9, 2012 (edited) What is happen at the very high Gravity region? Total gravity = light attraction force + something???----> very highly empty state. Edited June 9, 2012 by alpha2cen Link to comment Share on other sites More sharing options...
ACG52 Posted June 9, 2012 Share Posted June 9, 2012 There is no 'empty space'. All of space is filled with aprox. 400 million photons in every cubic meter. Everywhere. It's the CMBR. Link to comment Share on other sites More sharing options...
alpha2cen Posted June 10, 2012 Author Share Posted June 10, 2012 (edited) There is no 'empty space'. It's the CMBR. CMBR is a light long wave. It is one of radio micro waves. Edited June 10, 2012 by alpha2cen Link to comment Share on other sites More sharing options...
ACG52 Posted June 10, 2012 Share Posted June 10, 2012 CMBR is a light long wave. It is one of radio waves. CMBR is in the microwave range. It consists of photons. Link to comment Share on other sites More sharing options...
alpha2cen Posted June 10, 2012 Author Share Posted June 10, 2012 CMBR is in the microwave range. It consists of photons. The microwave, i.e., electromagnetic wave is dragged by Black Hole. Link to comment Share on other sites More sharing options...
ACG52 Posted June 10, 2012 Share Posted June 10, 2012 The microwave, i.e., electromagnetic wave is dragged by Black Hole. Which has to do with what? Link to comment Share on other sites More sharing options...
alpha2cen Posted June 10, 2012 Author Share Posted June 10, 2012 According to Relativity theory Black Hole center <----------------------------dragging-------------------------- electromagnetic wave(for example microwave) *************************gravity force Link to comment Share on other sites More sharing options...
ACG52 Posted June 11, 2012 Share Posted June 11, 2012 That's meaningless. Try using words instead of lines and arrows. Link to comment Share on other sites More sharing options...
alpha2cen Posted June 11, 2012 Author Share Posted June 11, 2012 Do not use this kind of sentence. That's meaningless. ==> That is no meaning., I do not understand the meaning. Try using words instead of lines and arrows. ==> How about using a detail sentence instead of using figure? Link to comment Share on other sites More sharing options...
hypervalent_iodine Posted June 11, 2012 Share Posted June 11, 2012 ! Moderator Note alpha2cen,For the purposes of discussion, you'll have to start being a bit more coherent. This thread will be closed if you can't start making sense and respond to people properly. Link to comment Share on other sites More sharing options...
Airbrush Posted June 11, 2012 Share Posted June 11, 2012 First of all, there is no such thing as an empty space. I don't even think an empty space exists inside a black hole... What do you think will happen to atoms, or any kind of particles, inside a black hole? They instantly fall to the singularity and get shrunk to a point. I do believe that inside a black hole is totally void of matter, except the massive singularity. How could it be otherwise? Link to comment Share on other sites More sharing options...
John Cuthber Posted June 11, 2012 Share Posted June 11, 2012 "They instantly fall to the singularity and get shrunk to a point." No. They do not. With a big enough black hole you could settle down and raise a family within the event horizon without knowing you were there. Did it not occur to you that to fall instantly they would need to travel at infinite speed which implies breaking the light barrier? Link to comment Share on other sites More sharing options...
Airbrush Posted June 11, 2012 Share Posted June 11, 2012 (edited) You are correct for supermassive black holes that are feeding, but for any-sized mass black holes, which are not feeding, inside the event horzon is totally void of matter, except the singularity. Edited June 11, 2012 by Airbrush Link to comment Share on other sites More sharing options...
alpha2cen Posted June 11, 2012 Author Share Posted June 11, 2012 (edited) How can we recognize the Black Holes, which are not feeding, through the telescope in the space? Edited June 11, 2012 by alpha2cen Link to comment Share on other sites More sharing options...
ACG52 Posted June 12, 2012 Share Posted June 12, 2012 You are correct for supermassive black holes that are feeding, but for any-sized mass black holes, which are not feeding, inside the event horzon is totally void of matter, except the singularity. Do you have any kind of citation for this claim. Because, given that we don't know what the singularity acutally is, and we don't know the physics inside the event horizon, to make the claim that there is no matter inside the event horizon is a bit premature. Link to comment Share on other sites More sharing options...
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