why is the universe expanding faster than light
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How can the Universe expand faster than the speed of light during inflation?  (Advanced) According to the theory of inflation , the Universe grew by a factor of 10 to the sixtieth power in less than 10 to the negative thirty seconds , so the  edges  of the Universe were expanding away from each other faster than the speed of light ; however , as long as those edges can't see each other ( which is what we always assume ) , there is no ...
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At what speed is the universe expanding? Is it faster or slower than the speed of light? The expansion of spacetime is not measured in the same units as the speed of light—the two are simply in different sets of units: 1  The speed of light is measured in units of velocity, which are m/s in conventional units.  The expansion of the universe is measured by the Hubble parameter, which has units of 1/time.
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FYI: Can Anything Move Faster Than Light? Some galaxies are already so far away from us, and moving away so quickly, that their light will never reach Earth. It's like running a 5K race, but the track expands while you're running, Bennett says. If it expands faster than you can run, you'll never get where you're going..
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Physics for Kids Light moves at the fastest known speed in the universe. Nothing moves faster than (or even close to) the speed of light. In a vacuum, where there is nothing to slow it down, light travels 186,282 miles per second! Wow, that's fast! When light travels through matter, like air or water, it slows down some, but it's still pretty fast. To give you and idea as to how fast light is, we'll give you some examples. The sun is almost 93 million miles from the Earth. It takes around 8 minutes for light to get from the sun to the Earth. It takes around 1.3 seconds for light to go from the moon to the Earth. Refraction. Normally, light travels in a straight path called a ray, however, when passing through transparent materials, like water or glass, light bends or turns.
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- In the next chapter you will see that the expansion of the universe is the expansion of space itself---the galaxies are not moving through space, but, rather, they are being carried along with the expansion of space. For now, use the figure above to see how a uniform expansion gives us the Hubble Law.o the astronomers on galaxy (c), galaxy (a) is moving away at 1,540 kilometers/second and galaxy (b) is moving away at 770 kilometers/second. Their home galaxy (c) appears to be at rest. You can use similar reasoning to show that everybody will also get the same numerical value for the Hubble constant.
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- The new observations argue against one popular theory of black hole growth, which holds that the objects bulk up in size through galaxy collisions. When our universe was young, galaxies were more likely to crash into others and merge. It is possible the galaxies' black holes merged too, accumulating more mass.he new observations argue against one popular theory of black hole growth, which holds that the objects bulk up in size through galaxy collisions. When our universe was young, galaxies were more likely to crash into others and merge. It is possible the galaxies' black holes merged too, accumulating more mass.
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- No. Radio waves ARE light, and so they travel at the speed of light. Possible exception: The speed of light $c$ that is always talked about as the speed limit of the Universe is the speed of light in vacuum. Light travels slower in a medium, and how much slower can be dependent on the wavelength of the light. So, in the right medium, radio waves could travel faster than optical waves, but I wouldn't call this faster than light; that would be very misleading... share | cite | improve this answer.
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- In empty space, lighttravels at a speed of about 300,000 km/s.Light travels so fast thatlight emitted from the Sun travels 150 million km to Earth inonly about eight and a half minutes.However, when light travels in matter, it interacts with theatoms and molecules in the material and slows down.
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Question: How fast is the speed of light compared to the speed of sound? The speed of light is much faster than the speed of sound. Sound moves at 343 metres per second (thats about 770 miles per hour!). The speed of light is a little trickier. In a vacuum it is roughly 300 000 000 metres per second (so nearly 900 000 times faster than sound!). However, when light moves through air or glass it gets slowed down a little bit so light moving through glass moves at 200 000 000 metres per second which is still 580 000 times faster than sound.
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- The Hubble Law shows that there is actually not a violation of the Copernican principle. Because the more distant galaxies move faster, this means that the galaxies (or galaxy clusters) are all moving away from each other---the universe is expanding uniformly.o the astronomers on galaxy (c), galaxy (a) is moving away at 1,540 kilometers/second and galaxy (b) is moving away at 770 kilometers/second. Their home galaxy (c) appears to be at rest. You can use similar reasoning to show that everybody will also get the same numerical value for the Hubble constant.
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- The initial pressure wave, created during the “big bang” event is the cause & effect that allows for the faster than light speed expansion of our universe ! The initial explosive event was so powerful that it created such a positive pressure wave that exited the event center well beyond the normal speed of light !
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How Fast Does Light Travel? | The Speed of Light Einstein's theory of special relativity sets of the speed of light, 186,000 miles per second (300 million meters per second). But some scientists are exploring the possibility that this cosmic speed limit changes. The speed of light in a vacuum is 186,282 miles per second (299,792 kilometers per second), and in theory nothing can travel faster than light. In miles per hour, light speed is, well, a lot: about 670,616,629 mph. If you could travel at the speed of light, you could go around the Earth 7.5 times in one second.
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Was Einstein WRONG about the speed of light? New theory could completely change our view of the universe When travelling across the vacuum of space, light travels in the form of packets of energy called photons. Scientists have measured the speed of light in a vacuum, placing the value at just under 300,000 km per second (186,000 miles per second). But the speed of light slows when it travels through different mediums, such as glass, water and even air.
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At what speed is the universe expanding? Is it faster or slower than the speed of light? The current rate of expansion of the universe is thought to be about. [math]70[/math] km/s per megaParsec. A megaparsec is a unit of distance approximately equal to three million light-years. This rate is not a speed, it is a speed per distance, so it cannot be compared to a speed (like that of light).
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Physical cosmology This point, later called the big bang, was the beginning of the universe as we understand it today. The expanding universe is finite in both time and space. The reason that the universe did not collapse, as Newton's and Einstein's equations said it might, is that it had been expanding from the moment of its creation. The universe is in a constant state of change.
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Faster Than the Speed of Light? Warp drive. “Space has been expanding since the Big Bang 13.7 billion years ago,” said Dr. White, 43, who runs the research project. “Nature can do it,” he said. Einstein famously postulated that, as Dr. White put it, “thou shalt not exceed the speed of light,” essentially setting a galactic speed limit.
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Stephen Hawking Asks Why are We Here & Where Did We Come From? But that was nothing compared to inflation in the early universe. The universe expanded by a factor of million trillion trillion in a tiny fraction of a second. Unlike inflation in prices, inflation in the early universe was a very good thing.
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- Hubble showed that, in our expanding universe, every galaxy is rushing away from us with a speed which is in direct proportion to its distance, known as Hubbles Law, so that a galaxy that is twice as far away as another is receding twice as fast, one ten times as far away if receding ten times as fast, etc.
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- The expanding universe is finite in both time and space. The reason that the universe did not collapse, as Newton's and Einstein's equations said it might, is that it had been expanding from the moment of its creation. The universe is in a constant state of change.
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Speed of Light No Longer the Limit The Princeton experiment and others like it test the limits of the theory of relativity that Albert Einstein developed nearly a century ago. According to the special theory of relativity, the speed of particles of light in a vacuum, such as outer space, is the only absolute measurement in the universe. The speed of everything else — rockets or inchworms — is relative to the observer, Einstein and others explained.
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General Astronomy/Print version The Earth is not moving any near fast enough for the effects of time dilation and special relativity to have an effect. Objects in the Solar System generally speaking are moving with respect to each-other at tens of kilometers per second, and the speed of light is three-hundred thousand kilometers per second.
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- Does the expansion of the universe soon after the Big Bang affect the amount of time that light takes to reach us? The time light has had to travel is simply by the age of the universe (or slightly less, because the very early universe was opaque).
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Ask Ethan #80: Can space expand faster than the speed of light? The fact that clocks and watches run slower at high speeds is only an artifact of the broader phenomenon that time and space are connected, and that a faster motion through space means a slower motion through time. The connection between the two — space and time — is given by the speed of light.
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Why/how does light travel faster than sound? Best Answer: Light is an electromagnetic wave. Photons have no mass, so the only limitation to the speed at which they can travel is the ultimate speed limit of the Universe, 300,000 km/s. Sound, on the other hand, is a compressional or longitudinal wave (depending on what terminology your textbook favors).
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- If time flows quicker in empty space, these bubbles accelerate in grow, so one do not need any dark energy for explanation of the acceleration of cosmic expansion. In short it may be just space/time property.
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- Exploring the dark universe at the speed of petaflops. An astonishing 95% of our universe is made of up dark energy and dark matter. Understanding the physics of this sector is the foremost challenge in cosmology today. Sophisticated simulations of the evolution of the universe ...xploring the dark universe at the speed of petaflops. An astonishing 95% of our universe is made of up dark energy and dark matter. Understanding the physics of this sector is the foremost challenge in cosmology today. Sophisticated simulations of the evolution of the universe ...