The Universal Timekeepers: Reconstructing History Atom by Atom Helfand David
The Universal Timekeepers: Reconstructing History Atom by Atom Helfand David Atoms are unfathomably tiny. And there's hardly anything to them: atoms are more than 99.9999999999 percent empty space.…
Specifikacia The Universal Timekeepers: Reconstructing History Atom by Atom Helfand David
The Universal Timekeepers: Reconstructing History Atom by Atom Helfand David
Atoms are unfathomably tiny. And there's hardly anything to them: atoms are more than 99.9999999999 percent empty space. It takes fifteen million trillion of them to make up a single poppy seed--give or take a few billion.
In looking so closely, we have learned that atoms, because of their inimitable signatures and imperturbable internal clocks, are little archives holding the secrets of the past.David J. Yet scientists have learned to count these slivers of near nothingness with precision and to peer into their internal states. Helfand reconstructs the history of the universe--back to its first microsecond 13.8 billion years ago--with the help of atoms.
He shows how, by using detectors and reactors, microscopes and telescopes, we can decode the tales these infinitesimal particles tell, answering questions such as: Is a medieval illustrated prayer book real or forged? How did