Undergrad Gravity & Time Dilation: Quantum Level Questions

[curiouschuck]

TL;DR

Time dilation and gravity on the quantum level

If gravity is the affect of time dilation because of the distance from the bottom of an object to the top then wouldn’t that mean that gravity doesn’t exist at the quantum level?

 

[Demystifier]

Gravity is not that. But even if it was, why do you think that it wouldn't exist at the quantum level?

 

[curiouschuck]

Gravity is not that. But even if it was, why do you think that it wouldn't exist at the quantum level?

 

[curiouschuck]

I’ve heard some postulate that gravity is the affect of time dilation on objects because of the difference in spacetime from one end of the object to the other. If this is true then wouldn’t that mean that objects not made of matter wouldn’t experience gravity?

 

[Drakkith]

If this is true then wouldn’t that mean that objects not made of matter wouldn’t experience gravity?

Light is not matter yet it experiences gravity.

 

[PeroK]

I’ve heard some postulate that gravity is the affect of time dilation on objects because of the difference in spacetime from one end of the object to the other. If this is true then wouldn’t that mean that objects not made of matter wouldn’t experience gravity?

If <some random assumption> leads to <nonsense>.

Then, the sensible thing to do is to reject the random assumption! Not to presume that the nonsense is true.

For example:

If fish can't survive in salt water, does this mean there are no fish in the sea?

 

[Demystifier]

For example:

If fish can't survive in salt water, does this mean there are no fish in the sea?

I think his question is more like:
If fish can't survive in salt water, does this mean there are no snakes in rivers?

 

[curiouschuck]

I'm talking about this


Is this true? If so, then (my original question)

 

[PeroK]

I'm talking about this


Is this true? If so, then (my original question)

That's a popular science simplification for the purposes of trying to explain GR to a lay audience. One of the problems with such simplifications is that they do not form a true or consistent picture of the whole theory.

A case in point is that if gravity depends only on gravitational time dilation, then what do we say about the paths of light rays?

The video's simplified version of GR, therefore, cannot be the whole story. There must be more to GR than time dilation! And there is.

 

[PeterDonis]

Moderator's note: Thread level changed to "I".

 

[PeterDonis]

I'm talking about this

This is not a valid reference; as @PeroK has pointed out, it's a pop science source, and pop science sources are not good sources for learning actual science. You need to be looking at an introductory textbook on GR if you want to learn how GR actually works.

Since no valid reference has been given, this thread is closed.