The
physical universe is enormously complex in detail. Every day, each of us
observes a great variety of objects and phenomena. And over the centuries,
the curiosity of the human race has led us to collectively to explore and
catalog a wealth of information vastly beyond the capacity of any single
person to assimilate. From the flight of the birds to colors of flowers,
from lightning to gravity, from quarks to clusters of galaxies, from the flow
of time to the mystery of the creation of the universe, we have asked
questions and assembled huge arrays of facts. And in the face of all these
details, we have discovered that a surprisingly small and unified set of
physical laws can explain what we observe. As humans, we make generalizations
and seek order. We have found that nature is remarkably cooperative—it
exhibits the underlying order of simplicity we so value.
It is the underlying order of nature that
make science in general, and physics in particular so enjoyable to study. The
unifying aspect of physical laws and the basic simplicity of nature from the
underlying themes of this text.
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