Black Holes seem like something that only exists in Science fiction, like Dark Matter and Energy, however, these astronomical objects are in fact at the heart of theoretical research within Cosmology. Research involving Black Holes may likely help us uncover more about the mysteries of Quantum Gravity, something Physicists believe to be the Theory of Everything.
In simple terms, a Black Holes is a region in which the gravitational influence is so strong that nothing, not even light, can escape its pull beyond the Event Horizon, which means that the Escape velocity is essentially greater than the speed of light. Escape velocity is the speed in which an object needs to travel at to escape a gravitational field, e.g. the Earth’s.
Last post I did a short guide on Special Relativity and I briefly mentioned time dilation which touches on the concept of Time Travel. Time Travel, like Parallel Universes or Teleportation is something that at a glance seems improbable, “beyond the boundary of physics” and just a complete work of science fiction, but interestingly enough all three of these areas are studied in-depth within the field of physics.
Einstein thought about space as a piece of fabric and essentially called it the fabric of space-time. We can think about time as a dimension, like length and width and height, there is a temporal dimension. Time travel is simply our progression through this dimension and we are all time travelling at this very moment because we are experiencing the passing of time. Time travelling to the future is a crucial everyday task, and it happens more naturally than people may acknowledge.
In the previous post I introduced the Many World’s hypothesis of Quantum Mechanics which is a possibility of parallel universe. Exploring possibilities of what types of parallel universes could exist may sound like science fiction however like time travel and teleportation, the idea of parallel universes is often the subject of mathematical and experimental investigation. In a recent episode of Star Talk, Michio Kaku mentioned the joy of trying to defy the impossible in his everyday job as a theoretical physicist.
The term parallel universes could seem vague and confusing to some. Exactly what is a parallel universe… Alternate timelines? An entire universe on its own outside the observable universe? Do parallel universes of all possible historical timelines exist? The matter is a little complicated. Physicists often use the words parallel universes to describe several different hypotheses of a number of possible universes outside our own combined to form something called the Multiverse. Hence the idea of parallel universes arises from the multiverse theory itself.