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Hawking

Biographies
Professor Stephen Hawking Biography
English physicist and cosmologist whose work in general
relativity, particularly gravitational field theory led to a search
for a quantum theory of gravity to explain black holes and the big bang,
singularities that classical relativity theory does not adequately explain.
His book A Brief History of Time (1988) gives a popular
account of cosmology and became an international best seller.
He later cowrote (with Roger Penrose) The Nature of
Space and Time (1996) and published The Universe in a Nutshell in 2002.
Hawking's objective of producing an overall synthesis
of quantum mechanics and relativity theory began around the time of the
publication in 1973 of his seminal book The Large Scale Structure of SpaceTime,
written with GFR Ellis.
His most remarkable result, published in 1974, was that
black holes could in fact emit particles in the form of thermal radiation
the socalled Hawking radiation.
Hawking was born in Oxford, studied at Oxford and Cambridge,
and became professor of mathematics at Cambridge in 1979.
He developed motor neurone disease, a rare form of degenerative
paralysis, while still at college studying for his PHd.
Hawking's most fruitful work is in the study of black
holes. Since 1974, he has studied the behaviour of matter in the immediate
vicinity of the black hole.
He has proposed a physical explanation for 'Hawking radiation'
which relies on the quantummechanical concept of 'virtual particles'
these exist as particleantiparticle pairs and fill 'empty' space.
Hawking suggested that, when such a pair is created near
a black hole, one half of the pair might disappear into the black hole,
leaving the other half, which could escape to infinity.
This would be seen by a distant observer as thermal radiation.
Source: Hutchinson Encyclopedia of Britain.
The Scientists
Roger Penrose
Physicist whose area of expertise, topology, used pictures rather than
equations to think about the nature of the universe.
This proved to be the perfect tool for Stephen Hawking
who was starting to find it very difficult to write.
Arno Penzias and Bob Wilson
American Nobel prizewinning scientists, in the field of radiology, whose
work provided physical evidence to back up Hawkings big bang theory.
Dennis Sciama
Hawking's academic supervisor at Cambridge.
Fred Hoyle
A plainspeaking Yorkshireman, and one of the first science TV pundits,
who proposed the Steady State theory, which argues that the universe had
no beginning.
