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Apr
29
awarded  Taxonomist
Apr
29
answered Layman's explanation and understanding of Einstein's field equations
Apr
29
comment Can a perfectly mathematically describable universe exist in a multiverse?
I'll leave the answer, but yeah it's no longer very applicable.
Apr
29
answered Can a perfectly mathematically describable universe exist in a multiverse?
Apr
27
comment Will a ferromagnet retain its magnetic properties after reaching the curie point?
just wanted to add a video which clearly demonstrates this effect: youtube.com/watch?v=mUz1ZaIHvDs. This is done in the field of a strong Neodymium magnetic so that the field can be recreated once the sample (Ni here) cools down.
Apr
27
comment How realistic is a “bolas” system for artificial gravity in space travel?
might be even more fun to consider two very massive pods orbiting around each other under the force of gravity. Then you have no need for the rope at all :-)
Apr
17
answered How GR, QFT, or string theory address the one-directional feature of time?
Apr
2
comment What would it take to cause lightning to jump between the Moon and the Earth?
Right, it's not easily calculated, which is why I choose the Schwinger limit. It might be something like an upper bound to this whole thing, I agree, but without some effective theory/time to worry about the interplanetary medium, I wanted something concrete to hold onto.
Apr
2
comment What would it take to cause lightning to jump between the Moon and the Earth?
I agree, the estimate may not be great but it's based on my assumption of total vacuum, and the lack of microscopic details of the physics involved.
Apr
1
revised What would it take to cause lightning to jump between the Moon and the Earth?
added 11 characters in body
Apr
1
revised What would it take to cause lightning to jump between the Moon and the Earth?
Expanding the answer, as promised.
Apr
1
revised What would it take to cause lightning to jump between the Moon and the Earth?
Expanding the answer, as promised.
Mar
31
answered What would it take to cause lightning to jump between the Moon and the Earth?
Mar
27
accepted Would the presence of B-modes in the CMB provide evidence for quantum gravity?
Mar
27
comment Would the presence of B-modes in the CMB provide evidence for quantum gravity?
In the context of my question, this looks like a great answer. Of course, if we see gravitational waves originating in an environment where quantum effects might be observable, that doesn't mean "the gravitational field is therefore quantized". But, since I framed the question as a scale problem, this looks to be the right answer, since the scale is appropriate for quantum effects.
Mar
27
comment Would the presence of B-modes in the CMB provide evidence for quantum gravity?
Since I asked the question, I'll just say that it's true this answer didn't directly provide explanation, but the links included in the answer do. And they are exactly relevant for the topic at hand, not the answerer's apparent dislike of inflation. In my book that's a good answer with some extraneous information, which is why I upvoted.
Mar
25
comment Would the presence of B-modes in the CMB provide evidence for quantum gravity?
...and we HAVE detected gravitational waves indirectly. Hulse and Taylor won a Nobel for it.
Mar
25
comment Would the presence of B-modes in the CMB provide evidence for quantum gravity?
Good answer with great links - Hoessenfelder's blog is always excellent. I think you get a little off-topic with the inflation comments - we don't have throw out the baby with the bathwater. I'm just curious about experimental evidence for quantum gravity, there are still great reasons for inflation.
Mar
25
revised Would the presence of B-modes in the CMB provide evidence for quantum gravity?
added something from a comment.
Mar
25
comment Would the presence of B-modes in the CMB provide evidence for quantum gravity?
@Danu: Yes, you are correct that is what I meant, and is one of the reasons I added my clarification - I don't want to worry about dust. But I'll add something more specific to the question.