Wednesday, December 2, 2009

Albert Einstein In Space

Albert Einstein






In 1905, Albert Einstein published a paper on a special theory of
relativity, in which he proposed that space and time be combined
into a single construct known as spacetime. In this theory, the
speed of light in a vacuum is the same for all observers - which
has the result that two events that appear simultaneous to one
particular observer will not be simultaneous to another observer
if the observers are moving with respect to one another. Moreover,
an observer will measure a moving clock to tick more slowly than
one which is stationary with respect to them; and objects are
measured to be shortened in the direction that they are moving with
respect to the observer.Over the following ten years Einstein worked
on a general theory of relativity, which is a theory of how gravity
interacts with spacetime. Instead of viewing gravity as a force
field acting in spacetime, Einstein suggested that it modifies the
geometric structure of spacetime itself. According to the general
theory, time goes more slowly at places with lower gravitational
potentials and rays of light bend in the presence of a gravitational
field. Scientists have studied the behaviour of binary pulsars,

confirming the predictions of Einstein's theories and Non-Euclidean

geometry is usually used to describe spacetime.