The Theory of Everything – the origin
and fate of the universe is an English Science Book written
by a brilliant theoretical physicist Stephen W. Hawking. He is one of
the world’s greatest minds. His work helped to reconfigure models of the
universe and to redefine what’s in it. Imagine sitting in a room listening to
Hawking discuss this achievements and place them in historical context. It
would be like hearing Christopher Columbus on the new world.
Hawking
presents a series of seven lectures-covering everything from the big bang to
black holes to string theory-that capture not only the brilliance of Hawking’s
mind but his characteristic wit as well. Of his research on black holes, which
absorbed him for more than a decade, he says, “It might seem a bit like looking
for a black cat in a coal cellar.”
Contents of the
Book
First Lecture: Ideas about the Universe
In
this lecture Hawking briefly reviewed the past ideas about the universe and how
we got to our present picture. One might call this the history of the history
of the universe.
Second Lecture: The Expanding Universe
In
this lecture Hawking described how both of Newton and Einstein’s theories of
gravity led to the conclusion that the universe could not be static, it had to
be either expanding or contracting. This, in turn, implied that there must have
been a time between ten and twenty billion years ago when the density of the
universe was infinite. This is called the big bang. It would have been the
beginning of the universe.
Third Lecture: Black Holes
In
the third lecture he told about black holes. These are formed when a massive
star or an even larger body collapses in on itself under its own gravitational
pull. According to Einstein’s general theory of relativity, anyone foolish
enough to fall into a black hole will be lost forever. They will not able to
come out the black hole again. Instead, history, as far as they are concerned,
will come to a sticky and at a singularity. However, general relativity is a
classical theory-that is, it doesn’t take into account the uncertainty
principle of quantum mechanics.
Fourth Lecture: Black Holes Aren’t So Black
In
this lecture Hawking was described how quantum mechanics allows leaking out of
black holes. Black holes aren’t black as they are painted.
Fifth Lecture: The Origin and Fate of the Universe
In
this lecture he was apply quantum mechanical ideas to the big bang and the
origin of the universe. This leads to the idea that space-time may be finite in
extent but without boundary or edge. It would be like the surface of the Earth
but with two more dimensions.
Sixth Lecture: The Direction of Time
In
this lecture he shows how this new boundary proposal could explain why the past
is so different from the future, even though the laws of physics are time
symmetric.
Seventh
Lecture: The Theory of Everything
Finally
in the seventh lecture Stephen Hawking was described how we are trying to find
a unified theory that will include quantum mechanics, gravity and all the other
interactions of physics. If we achieve this, we shall really understand the
universe and our position in it.
Book
Name: The Theory of Everything – The Origin and Fate of the Universe.
Writer
Name: Stephen W. Hawking.
Language: English.
Number
of Pages: 148.
File
Size: 1.20 MB.
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