Aug 25, 2019

Review: Thamizhaga Varalatril Kalapirar Kaalam

Thamizhaga Varalatril Kalapirar Kaalam Thamizhaga Varalatril Kalapirar Kaalam by T.K.Raveendran
My rating: 4 of 5 stars

The author has given some insight into the dark ages of South Indian history. A good read.

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Aug 6, 2019

Review: The Theory of Everything

The Theory of Everything The Theory of Everything by Stephen Hawking
My rating: 5 of 5 stars

This book is the compilation of seven lectures given by Stephen Hawking. The first lecture is the outline of history of the universe from the big bang to black holes. He briefly describes the previous ideas about the universe.

The second lecture he describes theories of gravity of Newton and Einstein that the universe is either expanding or contracting but not be static. A detailed explanation of the big bang in layman's language finds place in the lecture.

The 3rd lecture the author talks about black holes. How a black hole is formed and some information on the singularity and quantum mechanics.

The 4th lecture is about black holes are not black holes and elaborates on the quantum mechanics of energy leaking out of black holes.

In the 5th lecture the author applies his quantum mechanical ideas to the big bang and the origin of the universe, and he proposes that the space-time is finite and its extent is without boundary. (Needs second time reading to understand).

In the 6th lecture he questions why the laws of physics is time symmetric and why the past is so different from the future. I find it little bit difficult to grasp at first. If some one posts a video for this principle it will be much appreciated.

In the 7th and final lecture is about the most famed Unified Theory. He closes that lecture with an optimistic view of science which I quote below.

"However, if we do discover a complete theory, it should in time be understandable in broad principle by everyone, not just a few scientists. Then we shall all be able to take part in the discussion of why the universe exists. If we find the answer to that, it would be the ultimate triumph of human reason. For then we would know the mind of God."

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