- Shopping Bag ( 0 items )
Do you know:
With two remarkable ideas, Albert Einstein revolutionized our view of the Universe. His first was that nothing can travel faster than light-the ultimate speed limit. This simple fact leads to the unavoidable conclusion that space and time must be linked together forever as Spacetime. With his second monumental insight, Einstein showed how Spacetime is warped and stretched by the gravity of all objects in the Universe and even punctured by black holes. But such possible twisting of Spacetime allowed a magic not even Einstein could have imagined: time-travel.
Theoretical physicist Jim Al-Khalili finally lays science fiction to rest as he opens up Einstein's Universe. Leading us gently and light-heartedly through the dizzying world of our space and time, he even gives us the recipe for a time machine, capable of taking us Back to the Future, to Alice's Wonderland, or on a trip with the Terminator.
"...presents an introduction to the ideas first formed by Albert Einstein...examines black holes, the Big Bang theory, wormholes, and 'Spacetime.'"
Mr Al-Khalili explains that time is thought to have started along with the universe in the big bang, about 15 billion years ago (for comparison, the sun is about halfway through its life of about 10 billion years). Time also has a direction: although most physical processes are reversible, there is roughly speaking a tendency (familiar to parents) for the world to become ever less organised.
However, time does not always flow at the same rate: travelling close to the speed of light or falling into a black hole slows the passage of time relative to an observer. These are complex ideas that physicists usually express in mathematical language. Mr Al-Khalili avoids mathematics, yet gives an admirably clear account of some of the concepts involved. (December, 1999)
The book would be an excellent resource for school teachers in both Maths and Physics to enrich their teaching, and to enthuse their students. I especially liked the story of the hotel with an infinity of rooms, and the procedures for accommodating further infinities of guests. Finally the book delves into time and time travel and the debate on whether time travel is theoretically possible. This brings into focus the contradictions between quantum physics and general relativity. The reader is left well aware of what we do know and most importantly, what we don't know, and the exciting theoretical challenges ahead.
Many physicists will enjoy this easy to read book, but they will have to be patient with many of the easy bits. I highly recommend it for teenagers with an interest in science and for non-scientists interested in the deep questions of our universe. (October 1999)
SPACE: The 4th Dimension. Matters of Some Gravity. The Universe. Black Holes. TIME: Times are Changing. Einstein's Time. Time Travel Paradoxes. TIME TRAVEL: Wormholes. How to Build a Time Machine. What do we Know?
Posted June 7, 2000
This book explains with outstanding clarity very complex terms like what time is, what black holes and wormholes are, different possibilities for the shape of the universe and so much more. Mr. Al-Khalili refrains from using mathematical explanations and, using humor and focused arguments, illustrates briefly what is a wonderful introduction of the subject to general readers (highly recommended for teens). It practically changed my view upon the world.Was this review helpful? Yes NoThank you for your feedback. Report this reviewThank you, this review has been flagged.
Posted January 31, 2000
The best way to get introduce to the history and time details of the General Theory of Relativity and some of its possible consequences. An excellent treatment of the theme. Very precise, very modernized, probably do not miss any edge accepted theory about the title. And, one of the best things, you do not need to be a noble prize to understand the book. Congratulations to the authorWas this review helpful? Yes NoThank you for your feedback. Report this reviewThank you, this review has been flagged.