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- Dr. A. P. J. Abdul Kalam
15 Mar 2023
The Hawking effect, also known as Hawking radiation, is a theoretical phenomenon predicted by the famous physicist Stephen Hawking. It refers to the emission of particles by black holes that gradually evaporate over time.
The concept of Hawking radiation arises from the combination of two pillars of modern physics: quantum mechanics and general relativity. According to quantum mechanics, the vacuum of space is not empty but filled with virtual particles that constantly pop in and out of existence. When a pair of virtual particles is created close to the event horizon of a black hole, one particle can fall into the black hole while the other escapes into space.
The escaping particle carries away energy from the black hole, causing it to lose mass and eventually evaporate. This process is very slow for large black holes but becomes more significant for smaller ones, which can lose mass at an increasing rate and ultimately explode in a burst of radiation.
The Hawking effect has profound implications for our understanding of black holes and the universe as a whole. It implies that black holes are not entirely black but can emit radiation, which means they are not true vacuum cleaners of the universe. Furthermore, the effect suggests that black holes have a finite lifetime and eventually disappear, contradicting the classical idea that they are eternal and indestructible.
Although the Hawking effect is still a theoretical concept that has yet to be directly observed, its implications have inspired new research in many areas of physics, including quantum gravity and information theory. It is a testament to Stephen Hawking's extraordinary contributions to science and his ability to connect different fields of knowledge.