Introduction to Blackholes in Universe
Description
Vocal Characteristics
Language
EnglishVoice Age
Young Adult (18-35)Accents
North American (General)Transcript
Note: Transcripts are generated using speech recognition software and may contain errors.
I'll be talking about black holes in general. They were also known as black stores in the 17 hundreds. The basic idea of a black hole is that it is a store whose gravity is so strong that, like not escape from it. It is black because it does not reflect like, nor does its surface any light. The core of a star is located inside the start, a region where the temperature and pressures are sufficient to ignite a nuclear vision, converting atoms of hydrogen into helium and releasing a tremendous amount of heat. The size of the core depends on the mass of the star. The size of the core also determines the type of black hole the star becomes after being compressed. If a star's Courtis less than 1.4 times this sons mass, it becomes a white dwarf, which is a hot ball of super compressed matter and has the size off. Unearth. Astrologers also believe that thes white dwarfs are bright now. If the core is between 1.4 in 2.8 times the sun's mass, it collapses even further, becoming a neutron star that's only 20 kilometres across the nutrient soup inside both of the white dwarf and the Nutrients star resists the collapse and prevents the core from shrinking anymore. Now, if the Stars court is more than 2.8 times and that US of the sun, then the gravity of the star could overcome the resistance of the nutrients and continued its collapse. Then there is no force in the universe that could sought the collapse of the Stars court. Now, since there is no force the universe that could stop this collapse, they become black holes. To understand why black holes are dark, we would have to understand what escape velocity is. Escape velocity is the minimum speed needed for a free object to escape from our gravitational influence off a massive body for Earth. Escape velocity is about 11 kilometers per second. However, the sun has a much stronger gravity, causing it to have an escape velocity over 600 kilometers per second. Whereas the Nutrients star has an escape velocity 150 1000 kilometers per second, which is half of the speed of light for a collapsing star. As the star shrinks and compresses is gravity increases, causing escape velocity to increase when the collapsing star has a diameter off around 18 kilometers. The escape velocity at its surface will equal to the speed of light, causing the star to visibly look dark as there is no light rays shining through the star's atmosphere. No matter or object would have the ability to come out of the black hole unless we discover something that could travel faster than light, which is impossible. Basically, a black hole is the last state for core off, um, high mass star. The area around the black hole where they escape velocity equals to the speed of light, is called to the event horizon, meaning whatever happens in the black hole can be known of her sense of time and space doesn't really applies to black holes, meaning the physics within black holes follows a different perception, which is quite complex. The time we perceive is you to the effects of gravity, thinks to on in sons theory of general relativity. Our sense of time and space doesn't really applies to black holes. Also because of time dilation. However, the theory of general relativity states that if two people one on surface and another one in space, then they're Both will experience the passage of time very differently according to ever perception. Because the rate of time passing depends on the strength of the gravitational field that the observer is in. The gravity of black holes differs as you move away from it. This is caused by the Doppler effect. Most of gravity value off a black hole is in the event horizon, where gravity is in infinity. It is in the center of the black hole. Some physicists believe that the event horizon bend space time. There's plenty of misconceptions, as physicists own always agree on a single theory, such as that the sun has the ability to turn into black holes, and the black holes are like Kuzmin magnets or vacuum cleaners. However, son can't be a black hole as it takes the core of the store to be overcome. The nutrient degeneracy pressure by three times the mass of one son nutrients. Generous E is a stellar application off a principal stating that no to a nutrients can occupy identical states even under the pressure off a collapsing star off several solar masses, meaning that the original store that would be compressed and turned into a black hole. Its original structure would have the mass that is 20 times the sun's mass or even more. This means the sun would never turn into a black hole unless the sun was compressed down to a diameter off about six kilometers. Then it would overcome its neutron degeneracy pressure, which is impossible as noted before black holds. Do have a high gravity, and objects could be attracted to the black hole on Lee if they're close enough to it. So let's suppose that the sun could become a black hole. The Earth and other planets would not be attracted to it, as the Earth is 150 million kilometers away from the sun, and even a black hole couldn't attract everything in the universe. So gravity depends on the size of the black hole in the distance from a foreign object, like over earth and the black hole center, there is a fury between black holes and their gravity. As we approach a black hole and enter an area of gravitational pull, the gravity would grow stronger as the option reaches its center. However, the tidal forces would also apply on this foreign object, a title force is a difference in strength of gravity between two points. Times arise because the gravity weakens within distance. So if we were to analyze the relationship between moon and earth, the far side of the moon would be less pulled by the earth's gravity than the moon's near side, which faces theory Earth. However, if the title force is stronger than a body's cohesiveness, the body will be disrupted. So if a human where to be close enough to a black hole in the body would be stretched out a few milli seconds before the human dies. If the feet were to be closer to the black hold in the head, the feet would experience the gravity 1,000,000 times stronger than the head, causing the body to stretch and travel by the speed of light. Physicists and astronomers call this spaghetti ification. This type of fall applies to small black holds called stellar black holds. But if a particle gets near the stolen black hole, then it gets Tier two atomic level, causing the elections to be ripped off from its orbit and the Adam becomes shredded. Now, if we were to analyze the activity off a foreign object falling into a supernova black coal, which is also known as a supermassive black hole. Then spec edification wouldn't occur. However, any foreign object in space, like a star, would have in a substantial size. And if the star were to get close enough to the supernova or supermassive black hole, then it would be disrupted by tides. This may cause the star to melt like that could be trillion times the sun's energy.