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According to the Theory of Relativity the closer an object gets to the speed of light the slower it goes so why does light which travels at the speed of light travel at all?
Lightwaver
The question states an incorrect premise. As an object approaches the speed of light, neither the object nor light "goes slower". At relativistic speeds (speeds of about 1/100 of the speed of light or faster), the faster a body travels, the slower time passes for that body compared to a "non-moving" frame of reference.
Light is measured to travel at the same speed for all observers, no matter what the observer's speed is. For example, suppose you were in a space ship traveling at 1/2 the speed of light, and that space ship was racing toward a star. You would measure the light coming from that star at c, the constant speed of light. Now suppose your friend was in another space ship which was "stopped". Your friend would measure the same light coming from the same star at the same speed of c. The difference between you and your friend is your friend would age more quickly than you would, because time passes more slowly for you while you are traveling at relativistic speeds.
It is also true that, as a body approaches the speed of light, it develops something called relativistic mass. So you, your space ship, and everything in it gets heavier when you travel at 1/2 c. Because the space ship gets heavier, it becomes harder to push (it has greater inertia), and therefore it is more difficult to accelerate the space ship further to make it go even faster. So it is true that, as you approach the speed of light, the harder it is to approach the speed of light. The mathematics predicts that, at the speed of light itself, your relativistic mass is infinite1, and so is your inertia, therefore you can never "push" something to make it actually go as fast as the speed of light.
Light itself is a bit of an enigma. A photon - a light particle - has zero mass, but it does have momentum. Zero mass also means zero relativistic mass, allowing the photon to travel at c. In fact, not only can a photon travel at the speed of light, it must travel at the speed of light - a photon exists only while travelling at the speed of light - it ceases to exist if it stops or slows down.
1 Relativistic Mass = Rest Mass / SQRT ( 1 - v2/c2), v is the velocity and c is the speed of light.
Answer:
I think I know where this question is coming from, but you made a bit of a confusion perhaps? Basically, the closer you get to the speed of light, the slower time goes? Is that what you meant to say? Relativity is very hard to get your head around, because you need to drop the concept of velocity altogether, and only think of relative velocity, and time, and even length in the direction you travel in (I did say it would be weird!). Light will ALWAYS overtake you at 300000000m/s. It doesn't matter how fast you go, or how slow you go relative to the source of that light, it will always, if travelling through a vacuum, travel at the speed of light given, and this value is a constant value called C. Its the space speed limit that is policed by the laws of physics. But, if you did travel very fast (close to C), there would be a time dilation relative to people here on earth. And this was first discovererd when they realized that particles that came down to earth from the upper atmosphere had a half life such that they should have decayed before they made it to the ground, however, because their velocity relative to the earth approaches C, they actually lasted longer! This same principal would apply to humans, so it would be possible to sit in a space craft, go close to C, come out 1 year later, and for all your friends and family and everyone you know to have grown old, whilst you'd only be 1 year older, because more time would have passed on earth than would have passed in your space craft, and this is called the time dilation effect.
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Why does sound travel fastest through a solid medium?
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What is the difference of Einstein's special theory of relativity to newton's?
Einstein's special theory of relativity considers the rate of passage of time as variable since it explains motions of bodies at velocities closer to that of light; whereas Newton's laws of motion basically deal with practically attainable velocities therefore the rate of passage of time is treated to be constant.
Can you explain the special and general theory of relativity?
Special relativity states that all laws of science shall be the same to all obervers no matter their location or how they are moving in the absence of gravitational fields. General relativity is based on the same exact idea but also seeks to explain the force of gravity in terms of a curving four-dimensional space-time. The difference between these theories arises in that according to the theory of relativity, nothing can travel faster than the speed of light, however the gravitational attraction between 2 objects is stronger the closer they are to each other, if they are moved farther away or closer together the change in the attraction is instantaneous. Scientists sought to explain this, and Einstein did so by suggesting that gravity is not truly a force but in fact a consequence to the fact that space-time is curved/warped by the energies and masses within it and not flat as it had been thought of until then.
Will the mass change at a very high speed compared the speed of light?
Yes. According to the extended theory of relativity, mass will increase as an objects speed increases. The closer the object's speed gets to the speed of light, the greater its mass will be and a greater force will be required to continue to accelerate it.
Has Einsteins theory of relativity been completed?
Depends what you mean by "completed." Both special and general relativity are "complete" in that they fully describe that part of the Universe that they INTEND to describe. However, neither describes EVERYTHING. General relativity, for example, is a more complete theory than is special relativity. However, even GR is useful only for gravity, saying nothing about electro-magnetism (EM) in our Universe. Einstein was fully cognizant of this fact, and figured it would take a decade or so AT MOST to add EM to a fuller theory of relativity. Unfortunately, he was wrong -- not only is EM no closer to being combined with GR today than it was in 1915, but we now know that there are other forces we need to integrate into a more general theory! And even WORSE, we now know about quantum mechanics, which is mathematically IMPOSSIBLE to combine with GR. The final "completion" of relativity -- an combination of all forces with GR and QM -- still awaits us. If any person is able to devise a "Theory of Everything," s/he would go down in history in the same vein as Einstein or Newton.
Is a suggested answer to a question a theory?
No, a theory is usually closer to being proven. Before that, it's called a hypothesis. A suggested answer to a question is closer to a hypothesis.
Why does sound travel faster closer to the ground than in the air?
The stiffer meduim- travels quicker The denser the medium-travels slower
What medium sound travels through the fastest and why?
Solids. The atoms are closer together.
Do relativity equations hold true for normal conditions?
Yes. In the limit where the velocity difference between two observers gets ever closer to zero, the equations of spacial relativity reduce to the Newtonian equations. Indeed, if this were not true, then special relativity would be *wrong*. Similarly, general relativity gives the same answers as Newtonian gravity for the cases in which Newtonian gravity applies.
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the equater got closer
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Going by Einstein's theories of relativity, black holes warp the fabric of space-time to a severe extent. As matter comes closer and closer to the black hole, the matter is compressed and/or stretched in a process called spaghettification. There is also a worm hole theory which states a black hole will exit in another point in space, different universe, or even a whole new dimension.
What is the theory that the landmassaes on the earth's crust slowly move away or get closer to eatch other?
The theory of plate tectonics.
In particle theory why does liquid go to solid?
Closer bonding of particles.
