0
The recent work by Professor Hawking wherein he described a thermodynamic interaction with the universe originating in quantum effects near the event horizon takes his name, "Hawking radiation". The nature of the radiation itself is described as a particle-antiparticle pair (produced by intense gravity from the black hole acting upon a virtual particle) or sometimes as a quantum tunneling effect from just inside the event horizon; the negative component of which gets "added" to the black hole and thus reduces its mass (radiates inward) while its counterpart radiates outward. It is also calculated to be a very weak form of radiation.
What else can I help you with?
How long can a black holes exist?
It all depends on the mass of the black hole. It's called Hawking radiation.A black hole with the mass of:200lb - Near instantlyA Car - a nanosecondThe Moon - Slightly more time (not Five Billion Years)The Sun - A Black hole with the mass of the Sun will never evaporate due to it feeding on the energy in space. As the Cosmic Background Radiation is 2.7 Kelvin, the Hawking Radiation will cause for 100nanokelvins to be consumed do to Hawking Radiations Inverse relationship with the mass of a Blackhole. The bigger the Blackhole the less Hawking Radiation it will produce. As long as the universe has some warmth, namely the 2.7 kelvins, these types of Blackholes and larger will never evaporate.
Can black holes fit in a HR diagram?
One might quickly conclude that black holes don't belong on HR diagrams since the latter is designed for stars, and black holes generally aren't considered stars. Further, given that a spectral type would be necessary to plot any given entity on an HR diagram, a black hole would have to have such typification, which it does not have - given that, due to relativistic effects, it emits no significant light. If it were assigned a spectral type, it would still need to have an agreed-upon absolute magnitude, which some might argue was "infinite" for the same reason - reflecting the observer's inability to detect any (intrinsic) light. It is, however, generally accepted that black holes emit a kind of black-body radiation owing to quantum effects (Hawking radiation) for a temperature that may vary with its surface gravity. Even if a consensus could be built regarding its luminosity and its spectral type, its presence on an HR diagram may not be 'useful,' despite its significance in theories of stellar evolution to which the HR diagram so abundantly contributes.
What type of scientist studies black holes?
It depends on what you're studying besides black holes. If you're studying planets along with black holes, you could be an astrophysicist. Or, if you're studying atoms along with black holes, you could be a theoretical physicist. Just a few examples.
Do black holes have a critical mass?
The answer is more complicated than a mere 'yes' or 'no'. Dr. Stephen Hawking predicted that black holes emit a certain amount of thermal radiation (this became known as Hawking radiation). According to his predictions, the amount of radiation emitted by a particular black hole is inversely proportional to its mass. If he is correct, it means that there is a critical point where the mass of the black hole results in Hawking radiation emissions of a 'temperature' equal to that of the cosmic microwave background, approximately 2.7K (you can think of this as the temperature of space). Any larger, and even the cosmic microwave background serves to feed the black hole. Any smaller, and it will eventually evaporate. The exact mass needed for such an occurance (the 'critical mass') is not something that can be easily written down. It varies, somewhat, based on the type of black hole. That said, any black holes of mass equal to, or less than, that of the Moon could generally be expected to evaporate over time. All of this is speculation, however. Any black hole of sufficient mass to remain stable over time will emit so little radiation that it will be indistinguishable from the cosmic microwave background. Only a short lived black hole could be observed in such a manner, and we have yet to observe any.
Light produced when a black hole decays is called?
A type of weak radiation thought to be present due to quantum effects near a black hole's event horizon is often called Hawking radiation, after the scientist who proposed it, Professor Stephen Hawking.
What type of energy surrounds black holes?
Hawking radiation and a whole lot of everything else.
What type of radiation does radioactivity produces?
The Type Of Radiation That It Produce Is The Gamma Ray!
What can black holes eat?
Black Holes' can 'eat' any type of matter in the Universe.
What type of science is black holes?
Astronomy
Do microwaves produce radiation when they are in use?
Yes, microwaves produce non-ionizing radiation when in use, which is a type of electromagnetic radiation that heats up food by exciting water molecules.
What type of radiation does cobalt 60 produce?
Cobalt-60 produces gamma radiation, which is a type of electromagnetic radiation that is highly penetrating and can be used for various applications such as radiation therapy in cancer treatment and industrial radiography.
What type of radiation does paper have?
Paper does not produce radiation on its own. However, paper can shield against some forms of radiation, such as alpha radiation, due to its physical properties.
How long can a black holes exist?
It all depends on the mass of the black hole. It's called Hawking radiation.A black hole with the mass of:200lb - Near instantlyA Car - a nanosecondThe Moon - Slightly more time (not Five Billion Years)The Sun - A Black hole with the mass of the Sun will never evaporate due to it feeding on the energy in space. As the Cosmic Background Radiation is 2.7 Kelvin, the Hawking Radiation will cause for 100nanokelvins to be consumed do to Hawking Radiations Inverse relationship with the mass of a Blackhole. The bigger the Blackhole the less Hawking Radiation it will produce. As long as the universe has some warmth, namely the 2.7 kelvins, these types of Blackholes and larger will never evaporate.
Is an Intermediate-mass black hole a type of black hole?
Yes. Intermediate-mass blackhole is a medium size black hole. Scientists have found stellar black holes and supermassive black holes but there is no prove that Intermediate-mass black type of black holes exist. My opinion is that they do exist because when a black hole is becoming a black hole supermassiveblack hole it will need to go though this stage of intermediate-mass black hole.
What type of rays are associated with black holes?
The whole point of a black hole is that its gravity is so strong that nothing - not even a ray - can escape from its gravitational pull. However, it is theorised that Hawking radiation does escape from the event horizon. Not yet proven (May 2013).
Do black holes form at a ceartin type of year?
No. A year is the time it takes for Earth to orbit the sun. Black holes are formed far out in space and are not affected by Earth or its orbit.
What type of radiation may be stopped by protective clothing and a mask and can damage skin and produce a burn similar to a thermal burn?
Beta Radiation
