# Recent content by daisey

1. ### B Is Space Expanding in a Relativistic Way?

It's not a textbook, and it is not a book on cosmology. The book is called: "Time Explained", by Michael Savins. Here is the quote from his book. "The Universe is expanding and that expansion is accelerating but at the same rate as a metre measuring rod is increasing in length. The universe...
2. ### B Is Space Expanding in a Relativistic Way?

I agree the length of a meter does not change, but only relative to the expansion of space. The universe has always been the same width in "meters". And the length of a meter always remains "the length of the path traveled by light in a vacuum in 1/299,792,458 of a second" because as space...
3. ### B Is Space Expanding in a Relativistic Way?

Then what is meant by "the scale of space itself changes" in the following sentence?: "The metric expansion of space is the increase of the distance between two distant parts of the universe with time.[1] It is an intrinsic expansion whereby the scale of space itself changes"...
4. ### B Is Space Expanding in a Relativistic Way?

Regarding the expansion of space.... In one book I've read the diameter of the universe is more than 100B light years across, even though the age of the universe is only roughly 14B years old. This is due to accelerated expansion of space. In another book it says that space is expanding in a...
5. ### Quantum Zeno Effect - Explained

When you say above "when you measure", do you mean to say "when you start measuring"? Does the Quantum Zeno effect not work reliably when the observer begins taking measurements late into what is considered (I guess) the so-called half-life of the subject particle?
6. ### Quantum Zeno Effect - Explained

I've heard an interesting explanation of how the Quantum Zeno effect works, but I am still confused. Here is a summary of that explanation, as I understood it... When constant observations (or a series of observations taken at very short intervals) are made of a system in a superposition of...
7. ### Mass of the Electron

I thought that somewhere I read the Electron has no intrinsic mass, but instead gains it's mass via interaction with the Higg's field. But I found no reference to this in the electron's Wikipedia definition (although it is a long article, and I might have missed it). So what is true about...
8. ### Is Gravity a Force or Not?

I didn't mean to misquote Einstein. When I said that Einstein "said" that about gravity, I meant via his General Theory of Relativity. Although chances are I don't completely understand that theory.
9. ### Is Gravity a Force or Not?

I believe what you are saying is there are multiple theories on what causes gravity. And the Graviton is not part of Einstein's General Theory of Relativity. I am only familiar (in a very general sense, at that, no pun intended) with General Relativity. I know absolutely nothing about Quantum...
10. ### Is Gravity a Force or Not?

My apologies - in my question I should have stated "spacetime", not "space". For those that above are saying that gravity is the curvature of spacetime, can you please give me a simplified description of what the graviton is and what part it plays in curving spacetime? Or is there no way...
11. ### Is Gravity a Force or Not?

I have read a number of books that claim that, according to Einstein, gravity is not a force, but instead the curvature of space caused by mass. And some of those same books then go on to refer to it as a force, mediated by the so-called undiscovered graviton. Can someone please explain if...
12. ### Is SPIN a calculated or physically measureable characteristic?

I don't have the book in front of me, but I believe I remember reading (I paraphrase) the Photon's actual Spin was originally determined to be "2", and the Electron's "1". And for some reason they wanted to use the Photon's Spin as the baseline for comparison, so they "labeled" the Photon's...
13. ### Is SPIN a calculated or physically measureable characteristic?

That is interesting Am I correct in assuming that "1" and "1/2" are only a description of the relationship of the magnitude of Spins?
14. ### Is SPIN a calculated or physically measureable characteristic?

I am hearing that Spin is a property whose value is determined by calculation after measuring the effect it has on another directly measurable property of that same particle, and that Spin cannot be directly measured.
15. ### Is SPIN a calculated or physically measureable characteristic?

Regarding the term "Spin"... I've see a number of different descriptions. In the book I'm currently reading it says it is "loosely" the measure of the strength of rotational motion, and "technically" the measure of the quantity called angular momentum. It also states we consider the spin...