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I would consider 'omnidirectional' to be the antithesis of 'straight line travel'. Perhaps I am looking at this in an incorrect manner. The idea that lasers are straight natural formations caught me as unusual, after all...do lasers occur naturally?
The two (straight-line and omnidirectional travel) are not mutually exclusive.
Originally posted by TheWalkingFox
reply to post by satron
Colloquial term, not mathematical. You know full well what he means.
Sorry, I missed that.(BTW, I went back through the thread and still didn't see where light and gravity interaction was covered, but NBD)
Originally posted by Signals
reply to post by butcherguy
That's already been covered.
Are there straight lines and right angles in nature?
Originally posted by butcherguy
Do photons travel in a straight line when they are near a strong gravitational field?
Just checking.
I always wondered about that part of GR.
Originally posted by CLPrime
Originally posted by butcherguy
Do photons travel in a straight line when they are near a strong gravitational field?
Just checking.
Indeed they do. According to GR, gravity "warps" space, but photons continue to travel in a perfectly straight line through this warping. This merely give the appearance, to us, that light bends (and we call it gravitational lensing), when, in fact, it doesn't.
Honestly, Signals, the laser was probably the best example of straight lines in nature. All elementary particles travel in perfectly straight lines unless some external force (especially electromagnetism) acts on them...in which case they move in geometrically perfect spirals.