Headlights aren't shining very far

https://www.google.com/amp/s/www.fo...nstein-knew-that-gravity-must-bend-light/amp/

 

Light will bend with gravity, but the gravity field needs to be from something extremely massive like a blackhole, a star, red dwarf.....

I doubt if the Earth's gravity field is strong enough to bend light.

 

Ahhhh yes, Forbes, the authority on particle physics! Jokes aside, that author is a good source for facts on the subject.

Currently, the best and only evidence based theories are that gravity doesn't bend light, it distorts the space that light travels through. Light travels in a straight line, always, gravity or not. If the space that it travels straight through is curved, it will follow, but from the perspective of the photon, it is always going straight.

The example that light follows a perceived curved path by an observer that is accelerating relative to the source of light only demonstrates that the speed of light is not infinite.

This is one source that explains light, how it behaves and some theories of why, from a reputable source.

http://teacherlink.ed.usu.edu/tlnas...es/imagine/docs/ask_astro/answers/961102.html

 

If that was true, then any object with mass would bend light to some degree. It's not like there is a point where light is not affected by gravity and once gravity is strong enough, all of the sudden it is affected. Also, photons would have to have mass to be affected by gravity directly. So far there are many experiments that support the theory that photons have no mass and experiments that have had any ability to measure the mass of a photon have only been able to give a max theoretical mass due to sensitivity limits. In other words, data still supports the theory that the photon has no mass, but because of the technical limits of the equipment used in these experiments, IF a photon did have any mass it would have to be less that X amount or we would have been able to detect/measure it.


I thought this thread was about headlights! I'm happy to continue this discussion, but not here.