Effects of a massive object on light and its relation to the 1919 Eclipse

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[SOLVED] Effects of a massive object on light and its relation to the 1919 Eclipse

What happens to light as it passes near a massive object and how it this principle or concept connected to the 1919 lunar eclipse where Einstein’s Photoelectric theory was proved (both the apparent and actual location of the stars were revealed around the area of the eclipse?

Thanks for any responses in advance.
 

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drag
Science Advisor
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Greetings !

Light follows the shortest path through
space-time. The shortest path through
space-time is called the geodesic path.
According to General Relativity space-time
is bent by gravity, or to be more accurate -
curved space-time IS gravity.

Thus, the Sun bends space-time and the path
of light. The effect was predicted by Einstein
as a consequence of GR and the test in 1919
by the British Academy of Science (or something
like that I think) confirmed this. During
the eclipse the Sun was concealed by the moon
which allowed the scientists to see stars in
the background the light from which passed
very close to it on its way to Earth. The stars
were not exactly where they were supposed to be
(a bit farther from the Sun - they were
seen close "behind" the Sun on its path axis
instead of being concealed by it or closer to it)
which meant that their light WAS bent by gravity.
This was the first (I think) real and relativly
accurate confirmation of GR.

Live long and prosper.
 

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