Recent content by Pronoein

The mirrors are here to direct the light. From your source: «The lensing effect can magnify and distort the image of the background source.»

Thought experiment. Imagine building two optical mirrors around the sun an astrophysical body of the right mass, lined and diametrically opposed, at the right distance so that the sun is acting as a gravitational lens. Mirror A reflects the light from any extrasolar object and directs...

Thank you, I understand a little better now (mainly, that I know nothing!).

So even if the matter inside the black hole would disappear or teleport away, even if the black hole's inside would be emptied, the gravity field and coulomb field would remain? Those fields are not linked to the current content of the black hole, they're just remnants? They just are, without an...

I don't understand your answer, but since we're at it, I may as well formulate the paradox (at least to my layman's eyes) for which I was looking for an answer on the nasa's site: the mass and charge are within the event horizon of the black hole, yet they have an influence outside of the event...

@Tom Stoer: To be fair, please read the linked article, the gravity is explained as you say. The quoted part with virtual photons is about a charged black hole and electromagnetic radiations.

Hello. On the "Ask an Astrophysicist" page on the NASA site, one can read the following: This raises three questions for a layman such as me: 1. Do the scientific community agrees with this answer? 2. Can the virtual gnomes break any rule and fulfill any wish as long as we don't detect...

Hello, I'm a curious philosopher and I'm wondering what the scientists think about the main occupation of their life. I would gladly hear the members of the PF about this question: What are mathematics about?

Are those facts true? Volumetric density of matter and pressure are in equilibrium in vacuum? Is it correct to say that in this case gravity is expressed as a negative pressure?

Thank you for your answers. The Lesage theory is interesting. I understand that the theory of gravity as a mechanical negative pressure would be more or less this way (in lay terms, sorry!): 1. There is a constant multidirectional shower of particles which creates a constant pressure. 2. Matter...

Hello, this is an incredible simple question but I couldn't find an answer by myself. Is there a theory where gravity is a pressure and particles of matter low-pressure areas? (the pressure field could come from the overwhelming presence of a matter-repelling dark matter).