Professor Jim
Al-Khalili traces the story of arguably the most important, accurate and yet
perplexing scientific theory ever - quantum physics.
The
story starts at the beginning of the 20th century with scientists trying to
better understand how light bulbs work. This simple question led them deep into
the hidden workings of matter, into the sub-atomic building blocks of the world
around us. Here they discovered phenomena unlike any encountered before - a
realm where things can be in many places at once, where chance and probability
call the shots and where reality appears to only truly exist when we observe
it.
Albert
Einstein hated the idea that nature, at its most fundamental level, is governed
by chance. Jim reveals how, in the 1930s, Einstein thought he'd found a fatal
flaw in quantum physics because it implies that sub-atomic particles can
communicate faster than light in defiance of the theory of relativity.
For
thirty years his ideas were ignored. Then in the 1960s a brilliant scientist
from Northern Ireland called John Bell showed there was a way to test if
Einstein was right and quantum mechanics was actually mistaken. In a laboratory
in Oxford, Jim repeats this critical experiment - does reality really exist or
do we conjure it into existence by the act of observation.
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