Physicist Roger Penrose proposed a theory in 1969, which stated that power could be generated by dangling objects in the black hole. Scientists have been wondering about this for decades, as there was no way to travel to a black hole.
But, a team from the University of Glasgow has said that they verified the theory and have added some modifications to it. But, after this theory, they say that power will not be generated on earth, but it is a fascinating illustration of a long thought impossible theory.
Any object dipped into the outer layer of the black hole would charge negative energy. If the object is being cut, some energy can be used as recoil. Physicist Yakov Zel’dovich proposed a theory in 1971, which stated that bouncing light waves off of a cylinder rotate 1 billion times per second. It is way too fast and was not considered to be possible. So researchers proposed the Doppler effect of twisted sound waves bouncing off a spinning disk.
The Doppler effect (or the Doppler shift) is the change in frequency of a wave concerning an observer who is moving relative to the wave source. It is named after the Austrian physicist Christian Doppler, who described the phenomenon in 1842.
By altering the pitch of the sound waves and by increasing the amplitude, sound waves could borrow energy from the disk just in the way which the dangling object does from black holes gravity. The electricity generated is not free. The researchers still need to work on the spinning disk. But, it is also an achievement for a long conventional theory, which was once considered to be impossible is now being considered to be possible.
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