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"Our finding that Schwarzschild black holes have a pressure as well as a temperature is even more exciting given that it was a total surprise," said physicist and astronomer Xavier Calmet of the University of Sussex in the UK.
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"If you consider black holes within only general relativity , one can show that they have a singularity in their centres where the laws of physics as we know them must break down.
"It is hoped that when quantum field theory is incorporated into general relativity, we might be able to find a new description of black holes."
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When they made their discovery, Calmet and his University of Sussex colleague, physicist and astronomer Folkert Kuipers, were performing calculations using quantum field theory to try and probe the event horizon of a black hole.
Specifically, they were trying to understand the fluctuations at the event horizon of a black hole that correct its entropy , a measure of the progression from order to disorder.
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"The pin-drop moment when we realised that the mystery result in our equations was telling us that the black hole we were studying had a pressure – after months of grappling with it – was exhilarating," Kuipers said .
It's unclear what's causing the pressure, and according to the team's calculations, it's very small. Moreover, it's negative – expressed as -2E-46 bar for a black hole the mass of the Sun, compared to Earth's 1bar at sea level.
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I like to write motivational quotes. I like to motivate others. I like to observing people. I'm always crazy and curious about all kinds of knowledge. Always believe in yourself, think positive, stay positive, stay true, do good & spread positivity !
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