On November 6, at the meeting of the Royal Society, the result
was announced. The Sobral expedition reported 1.98; the Principe
expedition 1.62. The average was 1.8. Einstein had predicted 1.75,
Newton might have predicted 0.75, and the orthodox scientists would
have predicted 0. There could now no longer be any question as to which
of the three theories rested on a sure foundation. To quote Sir Frank
Dyson, the Astronomer Royal: "After a careful study of the plates I am
prepared to say that there can be no doubt that they confirm Einstein's
prediction. A very definite result has been obtained that light is
deflected in accordance with Einstein's law of gravitation." [5]
Where Did Einstein Get His Idea of Gravitation? In 1905 Einstein
published the first of a series of papers supporting and extending a
theory of time and space to which the name "the theory of relativity"
had been given. These views as expounded by Einstein came into direct
conflict with Newton's ideas of time and space, and also with Newton's
law of gravitation. Since Einstein had more faith in his theory of
relativity than in Newton's theory of gravitation, Einstein so changed
the latter as to make it harmonize with the former. More will be said
on this subject.
Let not the reader misunderstand. Newton was not wholly in the wrong;
he was only approximately right. With the knowledge existing in
Newton's day Newton could have done no more than he did; no mortal
could have done more. But since Newton's day physics--and science in
general--has advanced in great strides, and Einstein can interpret
present-day knowledge in the same masterful fashion that Newton
could in his day. With more facts to build upon, Einstein's law
of gravitation is more universal than Newton's; it really includes
Newton's.
But now we must turn our attention very briefly to the theory of
relativity--the theory that led up to Einstein's law of gravitation.
The Theory of Relativity. The story goes that Einstein was led to
his ideas by watching a man fall from a roof. This story bears a
striking similarity to Newton and the apple. Perhaps one is as true
as the other. [6]
However that may be, the principle of relativity is as old as
philosophical thought, for it denies the possibility of measuring
absolute time, or absolute space. All things are relative. We say
that it takes a "long time" to get from New York to Albany; long as
compared to what? long, perhaps, as compared to the time it takes to
go from New York City to Brooklyn. We say the White House is "large";
large when compared to a room in an apartment. But we can just as
well reverse our ideas of time and distance. The time it takes to go
from New York to Albany is "short" when compared to the time it takes
to go from New York to San Francisco. The size of the White House is
"small" when compared to the size of the city of Washington.
Public-domain text, read in full here on John Shaqi.
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