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Wiki User
∙ 13y ago
Wiki User
∙ 14y agoThere is no way (yet) to detect a black hole directly. Nothing escapes from a black hole, our scientific theories say, so the only way to detect it is indirectly, based on its gravity.
So when we see gas being excited to x-rays by the swirling turbulence of a strong but invisible gravity well, we can presume that a black hole is to blame. Or when a star appears to be moving in a binary system but there isn't anything else there, we can guess that perhaps a black hole is to blame.
Wiki User
∙ 10y agoAccording to current theory, if a star runs out of fuel, and its remainder - usually, the part that remains after a supernova explosion - is greater than a certain critical mass (believed to be about one and a half, or perhaps two, solar masses), it will collapse into a black hole. Less massive stars become white dwarves or neutron stars, depending, again, on their mass.
Wiki User
∙ 13y agoThey don't directly emit light, but anything falling into them will emit strong electromagnetic radiation - due to the acceleration of the matter falling into the black hole. Also, the black hole attracts all matter near it.
Wiki User
∙ 9y agoBlack holes are thought to interact with the universe thermodynamically, such that they have a finite non-zero temperature and entropy. This is attributed to quantum effects near the event horizon which can produce a weak radiation (Hawking radiation). Models for its production include energy transfer to virtual particles boosted by the immense gravity of the black hole, producing particle pairs one of which could be radiated away from the hole; per Einstein's equivalence of matter and energy, a loss of energy would equate to a loss of mass. Over a long period of time, if the loss of mass is not balanced by new infalling matter, the black hole could potentially "evaporate" entirely. The rate of radiation is shown to increase as the size of the black hole decreases, so it's possible the black hole might disappear with a "bang." Some efforts are underway to detect these events.
Wiki User
∙ 14y agoYour question is almost a trick question because there is no way we can know what a black hole looks like. Per definition, nothing can escape a black hole, even light, so there is no light reflection from a black hole which will allow us to see it. This is why a black hole is often represented as a black circle because we do not see the reflected light (objects which do not reflect light appear black).
However, by observing stars orbiting the black hole we can calculate the mass required to make such stars have these orbits and that is how we deduct that black holes exists.
Wiki User
∙ 13y agoWhen a star 100+ times more massive than our sun dies out, it explodes into a very violent explosion called a supernova. Then after some time, gravitational collapse causes the debris of the star to form in a spiral-like shape, thereby forming a black hole.
Wiki User
∙ 14y agoBy analysing light as it passes by a black hole - gravitational lensing.
Also, if a host star is close to a black hole, it is possible to observe the movement of gases from the host star to a black hole.
Wiki User
∙ 12y agoblack holes inside are very complex ed as the walls of the black hole accelerating faster than 299,792,458m/s (The velocity of the speed of light). When an object is sucked in you see a light with incredible brightness then you are pulled into a thing called the centre of horizon this is when the object on the wall go es down back to the speed of light which is shown above. Then after the object is
sucked into it as at the speed of light you die at and you do not exists in space time.
Wiki User
∙ 12y agoPeople recognize black holes when they are born. A black hole starts when a star's life ends in a super or hyper nova. Soon a neutron star will take its place. When the star runs out of fuel, the star then produces lithium and down the Periodic Table until it reaches to iron. Iron has special properties of absorbing energy eventually losing almost all of the energy. A tiny Black Hole starts at its core. Soon the black hole absorbs the star until the star realises. The star then shoots out two gamma ray bursts at 2 opposite sides which signals a black hole. The black hole eats all of the star and the starts ripping the space around it. The gamma ray bursts are recorded by NASA's Swift Space Craft. Since Swift went into operation, Scientist realizes that black holes are common due to the gamma ray bursts. In the sky, people see a black hole as very dark and hard to spot. Today scientists are planing to take a picture of the black hole at the center of the Milky Way galaxy using radio waves.
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If your body is a black hole are you invisible?
Black holes are invisible to the visible light spectrum and many others because their gravity is so strong it pulls in even light. So in theory yes. But a human body is FAR too light to ever form a black hole. However, if you define visibility as human perception of it, while we never see light from a black hole, we would notice the absence of light in an area, so even if it were possible to turn your body into a black hole, no one would see you, but the would see a black gap in space where you should be...
If nothing can escape a black hole in outer space how can you see photos of a black hole?
The answer is, you cannot see photos of a black hole. You are quite right; not even light can escape a black hole's incredible gravity, so all black holes are completely invisible. It is possible, however, to see long trails of matter that is being pulled into a black hole. The way we detect black holes from earth, however, is by picking up the gamma rays that they emit.
Can you see a black hole with a telescope?
No, because nothing can escape the black hole, not even light. So without light, we can't see anything. but, we can see stars being stretched like spaghetti and then being sucked into the black hole.
How do you make a black hole in universe sandbox?
You click on a planet,star,etc. scroll down and click Black Hole
How bright is a black hole?
The answer to that question is twofold: 1. A black hole of sufficient size itself is not very bright at all. Initially, it was thought that all radiation was absorbed into a black hole, rendering it effectively invisible. Stephen Hawking, however, calculated that a black hole may radiate at an insignificantly low temperature, a phenomenon now known as Hawking radiation. 2. Around a black hole of sufficient size, accretion disks of matter may form. The matter falls in towards the black hole, and before it enters the hole's event horizon is crushed and heated to extreme temperatures. The radiation this produces may be observed in various spectra and may be very bright indeed.
What is invisible because its gravity is so strong no form of radiation can escape from it?
The Answer is "Black Hole"
Are black holes invisable?
Yes and no. It is rather hard to explain, because black holes are so dark and black that no living creature can see them, which in a sense makes them invisible, but you can also see where a black hole is because it sucks in light, too, so that would also, in a sense make it visible, but the my main answer would be, no black holes are not invisible.
Are the things travel faster than light when they enter inside black hole so they become invisible?
No
Are blackholes really white?
No, black holes are actually invisible because it can suck it Light as well, so no light can escape from the black hole.
If your body is a black hole are you invisible?
Black holes are invisible to the visible light spectrum and many others because their gravity is so strong it pulls in even light. So in theory yes. But a human body is FAR too light to ever form a black hole. However, if you define visibility as human perception of it, while we never see light from a black hole, we would notice the absence of light in an area, so even if it were possible to turn your body into a black hole, no one would see you, but the would see a black gap in space where you should be...
Can you make light circular?
Only around a black hole. There is a sphere around every black hole where light orbits the black hole.
If nothing can escape a black hole in outer space how can you see photos of a black hole?
The answer is, you cannot see photos of a black hole. You are quite right; not even light can escape a black hole's incredible gravity, so all black holes are completely invisible. It is possible, however, to see long trails of matter that is being pulled into a black hole. The way we detect black holes from earth, however, is by picking up the gamma rays that they emit.
How do you know when there is a black hole?
black holes are invisible because its gravitational pull is so strong even light cant escape from it. so what scientists do is they look at things around the black hole. if there is a black hold near a planet or star that objects orbit will be altered and it will be heating up from the friction of going into the hole.
What is invisible but can be seen by the naked eye and if you put it in a barrel it would make the barrel lighter?
a hole
Can you make a black hole inside a black hole?
We know nothing about the conditions within a black hole, but it seems unlikely that a black hole could exist within a black hole, or even if this concept would have any meaning at all.
Is a quasar a galaxy with a super-massive black hole in its center?
Yes, a quasar is a galaxy with a super-massive black hole in its center. The hole being invisible, all light vanishing from the great gravity. The quasar itself, among the brightest, most luminous objects in the universe, is being powered by an accretion disc around the black hole.
What will the black hole do to your solar syatem?
Nothing, unless a black hole comes very near to us. By the way, you shouldn't say "the" black hole, unless you make it clear which black hole you mean. There are many black holes.
