Albert Einstein predicted gravity influences light propagation. So, I wonder, in altitude, far away from gravity center, is there any change in light propagation? How can it be possible to detect and spot it? Usually, people describe light in altitude as more crispy. Would a sensitive spectroscope be enough to spot that subtle change?
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0066319
Dear author, Congratulations on your excellent question.
With kind regards....
As Einstein predicted, light can be bent by gravity. Nowadays technics let us know when the light comes out of the sun (greater gravity), it is a bit slower. And when it reaches Earth, it is a bit faster, also due to gravity, even if the overall speed stays constant. http://www.conspiracyoflight.com/Light_Propagation_in_a_Gravitational_Field.pdf I wonder what would be the speed of light in a gravityless place. Just add international painters and photographs already know the answer. The light in Formentera island is so special.
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