GridHype.ID – Despite having a weak body condition, but the mind physicist This is even still useful for human civilization.
The fruit of his thoughts he poured in his doctoral thesis in 1966.
Since that year he has continued to produce his groundbreaking works continuing relentlessly until his last paper in 2018 was completed just days before his death at the age of 76.
During his lifetime, one physicist The greatest theorist of modern times is best known for his appearances in the popular media and his lifelong struggle with the debilitating disease.
But he was not only famous during his lifetime. Even after he died, his name continued to be discussed because one by one theory what he once said proved to be true later on.
There are at least four theory Stephen Hawking which has now been proven true.
Starting from his amazing view of black hole to his explanation of the humble beginning of the universe, here are four of his proven theories, as quoted from Live Science.
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1. The Big Bang Theory
Hawking got off to a great start with his doctoral thesis, written at a critical time when there was a fierce debate between two competing cosmological theories, the Big Bang Theory and the Steady State Theory.
Both theories accept that the universe is expanding, but the first assumes the universe expanded from an ultra-compact and super-dense state at a finite time in the past,
while the second assumes the universe has been expanding forever, with new matter constantly being created to maintain a constant density.
In his thesis, Hawking showed that the explanation of the Steady State theory is mathematically contradictory to the theory itself.
Instead, he argues that the universe began as a very small, dense point called a singularity.
Today, this description of Hawking is almost universally accepted among scientists.
2. Black holes are real
Stephen Hawking has been most associated with black holes, another type of singularity that forms when a star collapses under its own gravity.
The theory of the existence of black holes emerged from interpretations of Albert Einstein’s general theory of relativity and was debated for decades when Hawking turned his attention to these objects in the early 1970s.
According to an article in Nature, Hawking’s genius was to combine Einstein’s equations with the equations of quantum mechanics, turning what was previously a theoretical abstraction into something that seems to actually exist in the universe.
The last evidence that Hawking was right came in 2019, when the Event Horizon Telescope obtained live images of the supermassive black hole lurking at the center of the giant galaxy Messier 87.
3. Hawking radiation
Black holes are so named because their gravitational force is so strong that photons or light particles shouldn’t be able to escape from them.
But in his early work on the subject, Hawking argued that some photons would appear to radiate from a black hole.
The theory, now known as Hawking radiation, was recently confirmed in a laboratory experiment at the Technion-Israel Institute of Technology in Israel.
The researchers in Israel used an acoustic analogue, a “sonic black hole” that sound waves cannot escape from.
They detected the equivalent of Hawking radiation according to the predictions of the great physicist.
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4. The black hole area theorem
In classical physics, the entropy or disorder of a system, can only increase with time, never decrease.
Together with Jacob Bekenstein, Hawking proposed that the entropy of a black hole is measured by the surface area of the surrounding event horizon.
The black hole area theorem, which Hawking derived in 1971 from Einstein’s general theory of relativity, states that it is impossible for a black hole’s surface area to decrease over time.
The recent discovery of gravitational waves emitted by the merging of two black holes suggests that Hawking is right again.
As Hawking told the BBC in 2016 when two black holes were known to merge,
“The observed properties of the system are consistent with predictions about black holes I made in 1970 … the area of the last black hole is greater than the total area of the two original black holes.”
More recent observations in 202 have provided further confirmation of Hawking’s “black hole area theorem”.
So, gradually, the world seems to be proving the truth of one by one this amazing prediction from Stephen Hawking.
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