is black holes are black in color?

Answer 1

I believe so. the gravity is so strong not even light can escape, so they have to be dark.

Answer 2

Actually not. This is because of black hole radiation.Black holes radiate at all wavelengths but the number of photons in the visible range will so few that it will be almost impossible to see a visible colour from a black hole.
See the discussion below for details.

Black Hole:
Simply put, a black hole is a super dense object that has an intense gravitational pull. A black hole is a region of space that has so much mass concentrated in it that there is no way for a nearby object to escape its gravitational pull.

Light from a Black Hole:
One of their basic properties of black holes is that they trap light. According to the special theory of relativity (and also according to the general theory since it contains the special theory) that nothing exceeds the speed of light.

The particles of light, called the photons lose energy when travelling out of a gravitational field and appear to be redder to an external observer. . The stronger the gravitational field, the more energy the photons lose because of this gravitational redshift. The extreme case is a black hole where photons from within a certain radius lose all their energy and become invisible.

Another view of the same phenomenon is that the light can not escape out of a black hole as it can not go pass the event horizon. The event horizon is the point outside the black hole where the gravitational attraction becomes so strong that the escape velocity (the velocity at which an object would have to go to escape the gravitational field) equals the speed of light. Since according to the relativity theory no object can exceed the speed of light that means nothing, not even light, could escape the black hole once it is inside this distance from the center of the black hole.

Black Hole Radiation:
Classically, black holes are black. Quantum mechanically, black holes radiate. Recent attempts to understand black holes on a quantum level have indicated that they radiate thermally (they have a finite temperature, though one incredibly low if the black hole is of reasonable size) that is proportional to the gradient of the gravity field.

This radiation known as Hawking radiation, after the British physicist Stephen Hawking who first proposed it. Hawking radiation has a blackbody (Planck) spectrum with a temperature T given by
kT = hbar g / (2 pi c) = hbar c / (4 pi rs)
where k is Boltzmann's constant, hbar = h / (2 pi) is Planck's constant divided by 2 pi, and g = G M / rs2 is the surface gravity at the horizon, the Schwarzschild radius rs, of the black hole of mass M. Numerically, the Hawking temperature is T = 4 × 10-20 g Kelvin if the gravitational acceleration g is measured in Earth gravities (gees).

Hawking Radiation is due to the capture of virtual particles decaying from the vacuum at the horizon. These are created in pairs and one of them is caught in the black hole and the other is radiated externally.

Black holes in galaxy:
Paradoxically the black hole within a galaxy will be one of the most bright place. This is because the gas and other mass it pulls towards it will heat up due to friction and will create radiation in the visible range.

Answer 3

Dalilur R's answer is excellent. Remember that black means "absorbs all light that falls on it." But all black objects glow with their own radiation (black body radiation). So, when you say "black" you must really decide which radiation you are talking about (reflected or emitted.) For example, the burners on most stoves are black, but glow when heated.

Dalilur was correct in pointing out that some radiation leaves the vicinity of a black hole, namely one of a pair of virtual particles that are spontaneously created in the vacuum of space now and then. One point we might make, though, is that the virtual particles are being created whether the black hole is there or not, so when we detect a particle that comes from THE DIRECTION OF the black hole, it's no different from the particle that would have come our way even if the black hole were absent (except that the presence of the BH affects the wavelength of radiation coming at us.)

Answer 4

Black purely denotes that no easy or radiation comes for that course. Black holes don't have the certainly colour black as slightly bit coal does case in point. they do no longer even have an certainly floor that could have a colour. A black hollow isn't the singularity interior the middle however the area from stated singularity the place the break out speed reaches 3 hundred,000,000 meters consistent with 2d. there's a distance from the Earth's center (a million.152E7 m) the place the break out speed reaches 3 meters consistent with 2d. there is the comparable tangible demarcation there as whilst one passes an experience horizon: none.

Answer 5

Remember that colour of an object is decided by the wavelengths of light reflected by it.The 'colour' you experience depends upon the wavelength of the light energy reaching your eyes. If no light energy reaches your eyes you experience 'black' colour. The 'gravitational force' exerted by a 'black hole' is supposed to be so great that nothing, including light energy escapes from it. Therefore 'nothing' reaches your eyes from a 'black hole'. Hence, if you look at a 'black hole' you experience 'black'.

Answer 6

You cannot see the black hole itself, so yes it is black. What you can see is the event horizon, all the light and gases swirling into the black hole.

Answer 7

A black hole its self is invisible, but the gas it consumes heats up as it falls into it and becomes superheated so we see white.

Answer 8

Yes

Answer 9

in a way yes. their gravitational force is so huge that nothing not even light can ever escape so even though there incredibly hot they cannot be seen so we detect them with gravitational methods.

Answer 10

during that stage light is absorved so it is dark.If we see the pictures we can see light and many more colours