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So does light travel in a ray or does it not
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Yes it doesn't. Or no it does. It's definitely one of those.
I am not a number. I am a ... no, wait!
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But a ray cannot deviate from a straight line. Light however can bend due to gravity. Someone has been lying but the question is who.
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Pete Zahir wrote: But a ray cannot deviate from a straight line.
Says who? If that's your a priori definition of ray then light doesn't travel in one. No contradiction. No lying.
I am not a number. I am a ... no, wait!
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I can prove it does deviate with a simple mirror, or prism... 
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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There we have it!
Everyone take heed, because CP's expert on deviation hath spake.
I wanna be a eunuchs developer! Pass me a bread knife!
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I'll...um...take that as a complement?
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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Seriously?
Where did they teach you this stuff?
"Ray" is a descriptive word, used to describe what light looks like, to the human eye. It's not a "thing" in its own right, and it's not measurable (so it can't be used in any kind of calculation), even though it's used in grammatical structures that make it look determinant.
i.e. "a pound of sugar" and "a ray of light" might look the same, and give the impression that "ray" is determinant, but it's not. It doesn't matter how big or small a ray of light is, it's still just "a ray of light".
So you can't talk about rays as if they're separate from light. They are light -- or a non-unit-ish unit of light.
I wanna be a eunuchs developer! Pass me a bread knife!
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Mark_Wallace wrote: They are light
Search google for 'a ray of manure' ... you'll get a hit og two 
Espen Harlinn
Chief Architect - Powel AS
Projects promoting programming in "natural language" are intrinsically doomed to fail. Edsger W.Dijkstra
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Whoa, that's the gardening department. Might as well be Greek that's been google-translated to Hawaiian, for me.
Through that door, and talk to the missus.
I wanna be a eunuchs developer! Pass me a bread knife!
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Ray of manure? My aunt was married to him. Stinky old walking piece of Sh.t.
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Gravity distorts space, the "ray" travels through space in a straight line, it's space that bends.
PooperPig - Coming Soon
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Both.
Because of Quantum. 
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Yes it can be quite quarky.
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It's a charming effect!
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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Quote: Our brains are not ready.
Sorry I answered some others of you before reading this. Yep in this Point I can fully agree 
modified 19-Jan-21 21:04pm.
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Your brains are not ready. How small of you.
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Shut up all of you semi-theortical physicists! Cut the noise. Here's a name sounding like Russian. Let's sit down and listen to the real space man. 
Go ahead Mr R. Giskard Reventlov!
Starting to think people post kid pics in their profiles because that was the last time they were cute - Jeremy.
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The approach taken by superstring theorists is to add variables to represent motion in additional spatial dimensions. So while they cannot visualize in ten dimensions, by extension they can still calculate the behavior of particles moving in that many dimensions.
The problem is to avoid topological defects such as magnetic monopoles (particles that emit a magnetic field at rest). This is an amusing point in relativity theory: we know that a charged particle in motion curves under the influence of a magnetic field. But what if we shift to a reference frame that moves along with the particle. If the particle is at rest in that frame, there is no velocity, and so no force exerted by the field. The answer is that the fields themselves are also altered by the change of reference frame: in the particle's rest frame, there is an electric field that cause it to accelerate.
Similar things happen in General Relativity. One of the side effects in rolling up higher-dimensional spaces (to produce our three-dimensional reality) is that magnetic field lines can be forced into spatial rifts, which then appear as magnetic monopoles. A brilliant Indian mathematician "proved" (I'm not sure anybody understands the proof) that avoiding magnetic monopoles requires that the universe sit in ten or eleven spatial dimensions.
That current theory opts for the "ten" option may have something to do with the seven seals in the Book of Revelation. I'm not aware of any theoretical reason for the choosing ten over eleven. Much as Gell-Mann named his model of particle zoology the "eight-fold way" as a reference to Buddhism, my paranoid brain is half-convinced that some theorist chose ten because at the "end of days" that would mean the seven "sealed" dimensions would open upon our return to the Godhead - matching the number of seals on the scroll opened by the lamb.
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Actually, I will argue a Lizard Brain was created for these things.
The human mind was created with an additional ability to recognize ever increasing complex patterns.
Plus the ability to use pattern compression (like a cross between fractal and zip compression), and once again, re-iterate the pattern recognition process.
Mix in a little bit of curiosity, and a few free cycles to notice the world at varying levels. And we eventually stumble across communications and science. Communication only works because the definition of things like CUP is relatively fixed and contextually determinant (Sports vs. drinking).
So. I argue that we are designed to SEE patterns. Including ones that we do not yet understand (Gravity), and then we find ways to study them (lasers?) until we can produce devices that manipulate what we see. Once we are there, our endless creativity at trying different things (testing conjectures) until voila, we find something (spinning magnets<scifi guess="">) that appear to manipulate the gravity we see via lasers... Until we get a unique result.
Wash, rinse, repeat.
So, it is REALLY hard to explain a 4th or 5th dimension to someone who truly only sees 3 dimensions. But I will argue it becomes easier to mathematically accept an n-th dimension when we know how to manipulate it to get a non-linear result in 3D space.
Meaning. We will get there! And given a billion years of evolution, testing, recording, I would only take the counter bet because I would not live long enough to pay the winner!
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Those are definitely good points, but here comes the turtle.
Spacetime has been confused, widely, because of the terms of "sheet" for spacetime. Although the analogy is good, simple and easier to imagine. The problem comes, when you are trying to depict how gravity works; straight-line in which direction, how much space bends, how is it that a space is always bent towards the centre? These are a few problems that arise in minds when we consider spacetime to be a sheet.
I don't believe in dark matter, dark every and stuff similar to that. What I believe and can theorize is that "spacetime" is just the medium for "electromagnetic waves". We were lied when we were told, "light travels in vacuum". Physics books should be updated to include accurate descriptions over simplicit wrong explanations. Accordingly, the dark matter is nothing, but just another "level" of electromagnetic spectrum, which we have not yet discovered or come up against. We know Gammas are the strongest (in the means of their energy), who knows of the other way around?
This is where Quantum jumps in and breaks the very simple common sense. They take us in worlds, where we cannot go, and try to explain our worldly problems in an inter-universal solution format. For example, instead of explaining Big bang, they are finding answers to Multiverse, instead of creating equipment sensitive enough to focus on a single electron particle, they are calling it a wave.  What a lame excuse; same as the one programmers make by saying, "It works on my machine!".
Physics, needs abnormal people, who are able to imagine the world in an unusual way. Normal people are just making it worse. 
Or... am I missing the joke symbol here? 
The sh*t I complain about
It's like there ain't a cloud in the sky and it's raining out - Eminem
~! Firewall !~
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Afzaal Ahmad Zeeshan wrote: I don't believe in dark matter, dark every and stuff similar to that
Quite.
What these people don't seem to realise is that if there's all this "dark" stuff distorting everything, then everything they're seeing through telescopes is distorted and wrong, therefore all their assumptions based on that information are wrong, therefore there's no "dark" anything.
I wanna be a eunuchs developer! Pass me a bread knife!
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The truth is this:
Fall of the angel of light resulted in the fall of light speed. The slowing light generated massive red shift. And was now moving slower to be affected by gravity.
Dark matter/dark energy was an entity invented to make the naturalistic explanation fit. Occam's razor would removd it.
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