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[Daily Mail]Evidence of the existence of 'multiverse' revealed for the first time by cosmic map - Page 23

post #221 of 225
Quote:
Originally Posted by parityboy View Post

@thread

I remember reading somewhere that the expansion of our universe was in fact accelerating, i.e. the rate at which the galaxies were moving apart was actually increasing. Assuming that the effect of the big bang on planetary systems would remain constant if no other force was applied - i.e. the rate at which the universe expanded increased to a certain velocity and then held - then logic tells us that if the rate at which our universe expands has actually increased, then that must be caused by either

a) an expansion of force at the site of the big bang, i.e. a second big bang or

b) the rim of our universe, by virtue of expansion, has come close enough to something with enough mass to pull our universe towards it, thereby increasing the rate of expansion.

Here is one source that covers the topic (they look at quantum vacuums as possible explanation).

There's a number of other possibilities.

One is that the universe is doughnut shaped, and we're on the matter side ; when the universe expands enough in a curved (reimenian) manner, it will meet the anti-matter side and they will cancel each out.

Another is that the universe will continue to expand until particles are so far apart from one another that they simply cease to move, leaving the Universe in a zero-energy state, frozen.

One more .... the Universe is an elastic band, and at a certain point the universe will collapse back into itself (Note: this won't happen, maths have been done. no, not theory, actual quantifiable facts)
Edited by dmanstasiu - 6/19/13 at 9:57am
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post #222 of 225
Quote:
Originally Posted by Tsumi View Post

All forms of light (microwave, radio waves, visible light, infrared, ultraviolet, x-rays, etc) travel at the same speed. Einstein's theory of general relativity (which has been shown to be true) says that light travels at the same speed with respect to you no matter what speed you are moving at. If you're moving at half the speed of light, you will still see light coming towards you and moving away at the speed of light.

Confusing, isn't it? tongue.gif That's where red shift and blue shifts come into play, which is what we use to determine whether or not something is moving away or towards us. It's the same principle as when a car comes towards you, the sound is higher pitched than when it's moving away from you.
I remember watching Modern Marvels on the History Channel all the time. Now it's complete crap...

thanks ! That clealed most of things I was confused in.
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post #223 of 225
Quote:
Originally Posted by sumitlian View Post

Quote:
Originally Posted by Tsumi View Post

All forms of light (microwave, radio waves, visible light, infrared, ultraviolet, x-rays, etc) travel at the same speed. Einstein's theory of general relativity (which has been shown to be true) says that light travels at the same speed with respect to you no matter what speed you are moving at. If you're moving at half the speed of light, you will still see light coming towards you and moving away at the speed of light.

Confusing, isn't it? tongue.gif That's where red shift and blue shifts come into play, which is what we use to determine whether or not something is moving away or towards us. It's the same principle as when a car comes towards you, the sound is higher pitched than when it's moving away from you.
I remember watching Modern Marvels on the History Channel all the time. Now it's complete crap...

thanks ! That clealed most of things I was confused in.

Speed =! Frequency.

As light travels faster or quicker, it will "reverberate" infinitessimally more quickly, or more slowly ; similar to how an ambulance's siren will sound lower or more high-pitched, depending whether it's going towards you or away from you.

same principle, applied to light instead of sound. And as he was saying, we can judge the speed at which a galaxy is approaching or leaving us, by the degree in which the light waves coming from in shift in frequency (nm)
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post #224 of 225
Quote:
Originally Posted by kennyparker1337 View Post

It's all about getting more viewership in a declining medium.

Ancient Aliens sells a lot better than Ancient Civilizations.
Actually the way you are classifying things is what is masking the proper answer.
VHF and Gamma are both light waves. They are just light waves at a frequency beyond what we humans can perceive visually.
Radiation is just a term we use to classify a section of light that can travel through objects.
Radiation is a subset of light.

So what you were really asking was "Can light travel faster than light?" and thus the confusion.

The simple answer is no.

LOL Now I am feeling real dumb redface.gif (may be because of the influence of overwhelming sometimes tongue.gif ).

Well I was confused in that the "c = speed of visible light" or "c = total light" tongue.gif
Now I am ok redface.gif
and thanks smile.gif
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post #225 of 225
Quote:
Originally Posted by dmanstasiu View Post

Speed =! Frequency.

As light travels faster or quicker, it will "reverberate" infinitessimally more quickly, or more slowly ; similar to how an ambulance's siren will sound lower or more high-pitched, depending whether it's going towards you or away from you.

same principle, applied to light instead of sound. And as he was saying, we can judge the speed at which a galaxy is approaching or leaving us, by the degree in which the light waves coming from in shift in frequency (nm)
Thanks ! very informative smile.gif
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