Black holes, wormholes and time machines.pdf
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Black Holes, Wormholes and Time Machines
by Jim Al-Khalili
Do you know:
•What might happen if you fall into a black hole?
•That the Universe does not have an edge?
•That the reason it gets dark at night is proof of the Big Bang?
•That cosmic particles time-travel through the atmosphere defying death?
•That our past, present and future might all coexist "out there"?
With two remarkable ideas, Albert Einstein revolutionized our view of the Universe. Einstein showed how Spacetime is warped and stretched by the gravity of all objects in the Universe and even punctured by black holes. But such possible twisting of Spacetime allowed a magic not even Einstein could have imagined: time-travel.
Theoretical physicist Jim Al-Khalili finally lays science fiction to rest as he opens up Einstein's Universe.
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by Jim Al-Khalili
Do you know:
•What might happen if you fall into a black hole?
•That the Universe does not have an edge?
•That the reason it gets dark at night is proof of the Big Bang?
•That cosmic particles time-travel through the atmosphere defying death?
•That our past, present and future might all coexist "out there"?
With two remarkable ideas, Albert Einstein revolutionized our view of the Universe. Einstein showed how Spacetime is warped and stretched by the gravity of all objects in the Universe and even punctured by black holes. But such possible twisting of Spacetime allowed a magic not even Einstein could have imagined: time-travel.
Theoretical physicist Jim Al-Khalili finally lays science fiction to rest as he opens up Einstein's Universe.
Share: @AstroMechanics
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What is a Condensed matter physics(Condmat)?
🔥Condensed matter physics, often abbreviated as "condmat," is the branch of physics that studies the physical properties of solids and liquids, particularly their electronic, magnetic, and optical properties.
It deals with the behavior of large groups of atoms or molecules and the interactions between them. Examples of condensed matter include metals, semiconductors, superconductors, and liquid crystals.
📌Condensed matter physics has many practical applications, such as the development of new materials for electronics and the study of the properties of materials used in energy generation and storage.
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🔥Condensed matter physics, often abbreviated as "condmat," is the branch of physics that studies the physical properties of solids and liquids, particularly their electronic, magnetic, and optical properties.
It deals with the behavior of large groups of atoms or molecules and the interactions between them. Examples of condensed matter include metals, semiconductors, superconductors, and liquid crystals.
📌Condensed matter physics has many practical applications, such as the development of new materials for electronics and the study of the properties of materials used in energy generation and storage.
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What are the classification of condmat?
It can be divided into several subfields based on the properties of the materials being studied and the techniques used to investigate them. These subfields include solid-state physics, soft condensed matter physics, materials science, surface and interface science, nanoscience and nanotechnology, and quantum condensed matter physics.
📌Each subfield focuses on different aspects of materials science, ranging from the properties of solids and liquids to the behavior of materials at the nanoscale and in extreme conditions such as low temperatures and strong magnetic fields.
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Condensed matter physics is a field that studies the physical properties of materials, including their electronic, magnetic, and optical properties. It can be divided into several subfields based on the properties of the materials being studied and the techniques used to investigate them. These subfields include solid-state physics, soft condensed matter physics, materials science, surface and interface science, nanoscience and nanotechnology, and quantum condensed matter physics.
📌Each subfield focuses on different aspects of materials science, ranging from the properties of solids and liquids to the behavior of materials at the nanoscale and in extreme conditions such as low temperatures and strong magnetic fields.
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Is time real or not?
✨The question of whether time is real is a philosophical and scientific one that has been debated for centuries. In physics, time is usually treated as a dimension, along with space, that is fundamental to our understanding of the universe. It is also intimately tied to the concept of change, as the passage of time is often associated with the occurrence of events and the evolution of physical systems.
However, some philosophers and physicists have argued that time may not be a fundamental aspect of reality but rather an emergent property of more basic physical processes. For example, some theories of quantum gravity suggest that time may be an illusion that arises from the entanglement of fundamental quantum states.
📌Ultimately, the question of whether time is real may not have a straightforward answer, and it may depend on the specific framework or perspective being used✨
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✨The question of whether time is real is a philosophical and scientific one that has been debated for centuries. In physics, time is usually treated as a dimension, along with space, that is fundamental to our understanding of the universe. It is also intimately tied to the concept of change, as the passage of time is often associated with the occurrence of events and the evolution of physical systems.
However, some philosophers and physicists have argued that time may not be a fundamental aspect of reality but rather an emergent property of more basic physical processes. For example, some theories of quantum gravity suggest that time may be an illusion that arises from the entanglement of fundamental quantum states.
📌Ultimately, the question of whether time is real may not have a straightforward answer, and it may depend on the specific framework or perspective being used✨
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Is time travel possible🕰🏃♂?
As far as current scientific understanding goes, time travel to the past is currently not possible using any known technology or scientific methods.
While time travel to the future is technically possible according to the theory of relativity, it would require traveling at extremely high speeds or being in the presence of extremely strong gravitational fields, both of which are beyond current technological capabilities.
There have been some proposed theoretical concepts for time travel, such as the idea of traversable wormholes or the use of time dilation via near-light-speed travel, but these ideas are still purely speculative and have not been experimentally validated.
📌It's worth noting that time travel is a topic of science fiction, and while it may be entertaining to imagine, it is important to distinguish between what is scientifically possible and what is purely fictional.
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As far as current scientific understanding goes, time travel to the past is currently not possible using any known technology or scientific methods.
While time travel to the future is technically possible according to the theory of relativity, it would require traveling at extremely high speeds or being in the presence of extremely strong gravitational fields, both of which are beyond current technological capabilities.
There have been some proposed theoretical concepts for time travel, such as the idea of traversable wormholes or the use of time dilation via near-light-speed travel, but these ideas are still purely speculative and have not been experimentally validated.
📌It's worth noting that time travel is a topic of science fiction, and while it may be entertaining to imagine, it is important to distinguish between what is scientifically possible and what is purely fictional.
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The ‘breath’ between atoms — a new building block for quantum technology
Breathing is a natural process found in living and non-living things. Even on the atomic level, there is a type of breathing called Mechanical vibration.
Recently, a University of Washington research team discovered that they could detect atomic "breathing" by observing the type of light atoms emit when stimulated by a laser. The team plans to use this discovery to encode and transmit quantum information and develop a new type of building block for quantum technologies. The quantum platform uses "optomechanics," where light and mechanical motions are coupled together, to control single photons running through integrated optical circuits for various applications. The team's findings were published in Nature Nanotechnology.
✅ Source: Read here
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Breathing is a natural process found in living and non-living things. Even on the atomic level, there is a type of breathing called Mechanical vibration.
Recently, a University of Washington research team discovered that they could detect atomic "breathing" by observing the type of light atoms emit when stimulated by a laser. The team plans to use this discovery to encode and transmit quantum information and develop a new type of building block for quantum technologies. The quantum platform uses "optomechanics," where light and mechanical motions are coupled together, to control single photons running through integrated optical circuits for various applications. The team's findings were published in Nature Nanotechnology.
✅ Source: Read here
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Light Years Facts⚡
✨Distance in space is very vast that the fastest thing in the universe, light, is used to measure them.
✨The speed of light is 300,000km/s.
✨The distance in space is so huge they are measured in light years- the distance light travels in a year.
✨A light-second is the distance that light travels in one second, 300 million meters.
✨A light year is the distance that light travels in one year, 9.46 trillion km.
✨Light years are one of the standard distance measurements in astronomy.
✨It takes about eight minutes for light from the sun to reach Earth.
✨Light takes 4.22 years to reach Earth from the sun's nearest star, Proxima Centauri. That means the star is 4.22 light years away- more than 40 trillion km.
✨Viewed from Earth Proxima Centauri looks like it was 4.22 years ago because its light takes 4.22 years to reach Earth.
✨Astronomers use Parsec to measure distances. They originally came from parallax shift measurement. A light year is 0.3066 parsecs.
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✨Distance in space is very vast that the fastest thing in the universe, light, is used to measure them.
✨The speed of light is 300,000km/s.
✨The distance in space is so huge they are measured in light years- the distance light travels in a year.
✨A light-second is the distance that light travels in one second, 300 million meters.
✨A light year is the distance that light travels in one year, 9.46 trillion km.
✨Light years are one of the standard distance measurements in astronomy.
✨It takes about eight minutes for light from the sun to reach Earth.
✨Light takes 4.22 years to reach Earth from the sun's nearest star, Proxima Centauri. That means the star is 4.22 light years away- more than 40 trillion km.
✨Viewed from Earth Proxima Centauri looks like it was 4.22 years ago because its light takes 4.22 years to reach Earth.
✨Astronomers use Parsec to measure distances. They originally came from parallax shift measurement. A light year is 0.3066 parsecs.
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Why does the Moon "follow" us when we drive?
As we rush down the road, we notice how everything flies past us in the opposite direction: trees, houses, fences, the road. And from the Moon, too, we expect it to fly past us, or at least go backwards the farther forward we go. When it doesn't, we feel as if it is "following" us.
The Moon may not seem to be very far away from us, but the average distance from it to Earth is 384,400 km. This enormous distance explains why, when we drive a car and look at the Moon, it seems as if it is following us.
Compared to the distance our car travels in a few minutes, this distance is enormous. So as we drive, the angle at which we see the moon remains virtually unchanged. And while everything flies past us, there is a sense that the Moon is "following" us.
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As we rush down the road, we notice how everything flies past us in the opposite direction: trees, houses, fences, the road. And from the Moon, too, we expect it to fly past us, or at least go backwards the farther forward we go. When it doesn't, we feel as if it is "following" us.
The Moon may not seem to be very far away from us, but the average distance from it to Earth is 384,400 km. This enormous distance explains why, when we drive a car and look at the Moon, it seems as if it is following us.
Compared to the distance our car travels in a few minutes, this distance is enormous. So as we drive, the angle at which we see the moon remains virtually unchanged. And while everything flies past us, there is a sense that the Moon is "following" us.
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🙌Dear Members, If you see promotion links on the channel they are for the growth of the channel, "it's not part of our content" so help us by being patient and not leaving!!🙏
@AstroMechanics
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Infinity-Science pinned «🙌Dear Members, If you see promotion links on the channel they are for the growth of the channel, "it's not part of our content" so help us by being patient and not leaving!!🙏 @AstroMechanics»
Dark matter may increase the temperature of planets
Astrophysicists thought that dark matter could be some kind of primordial matter surrounding every galaxy after the Big Bang. However, it has yet to be discovered. To find it, astrophysicists intend to use exoplanets.
It turns out that dark matter penetrates the cores of exoplanets and produces large amounts of heat. Thanks to this, the temperature on their surfaces rises.
📌After all, an exoplanet must first cool down after its birth in an explosion.
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Astrophysicists thought that dark matter could be some kind of primordial matter surrounding every galaxy after the Big Bang. However, it has yet to be discovered. To find it, astrophysicists intend to use exoplanets.
It turns out that dark matter penetrates the cores of exoplanets and produces large amounts of heat. Thanks to this, the temperature on their surfaces rises.
📌After all, an exoplanet must first cool down after its birth in an explosion.
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The Shape of the Universe
Surprisingly no-one actually knows. Previous measurements have shown the universe appears to be flat, but recently the cosmic microwave background was mapped and indicated the universe might be closed or spherical in shape.
A spherical universe raises many problems for cosmology, as it brings into question the validity of the model of cosmic inflation. Inflation is a period of rapid expansion the universe is thought to have undergone shortly after the Big Bang. The problem arises as this model leads to a flat universe, not a closed one. Nothing like a new result to shake up our understanding the universe!
📌More data is currently being collected, which will give a greater insight into this problem.
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Surprisingly no-one actually knows. Previous measurements have shown the universe appears to be flat, but recently the cosmic microwave background was mapped and indicated the universe might be closed or spherical in shape.
A spherical universe raises many problems for cosmology, as it brings into question the validity of the model of cosmic inflation. Inflation is a period of rapid expansion the universe is thought to have undergone shortly after the Big Bang. The problem arises as this model leads to a flat universe, not a closed one. Nothing like a new result to shake up our understanding the universe!
📌More data is currently being collected, which will give a greater insight into this problem.
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Mind-blowing: how James Webb telescope’s snapshots of the infant universe transformed astronomy🤯
READ HERE
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READ HERE
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Human signals into space
In 2013, four signals of different frequencies were sent to the star Gliese 526. And also such a map with the classification of flying saucers. They also sent Leonardo da Vinci's "Annunciation" in mirror image, a picture of a pony in space, and cave paintings. Whoever sees this signal will clearly know whom he is dealing with😁
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In 2013, four signals of different frequencies were sent to the star Gliese 526. And also such a map with the classification of flying saucers. They also sent Leonardo da Vinci's "Annunciation" in mirror image, a picture of a pony in space, and cave paintings. Whoever sees this signal will clearly know whom he is dealing with😁
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Did you know that.....
The early universe just consisted of photons (except quarks) the photons were roaming around in the hot expanding infant universe.
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The early universe just consisted of photons (except quarks) the photons were roaming around in the hot expanding infant universe.
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