The universal speed limit, which we commonly call the speed of light, is fundamental to the way the universe works. It is difficult to visualize this if you have never heard about it before, but scientists have found that the faster you go, the more your spatial dimension in the forward direction shrinks and the slower your clock runs when viewed by an external observer.
In other words, space and time are not a fixed background on which everything takes place in the same way it always does. Instead, space and time can warp and bend. If you look at the equations which are at the core of Einstein's theories of relativity, you find that as you approach the speed of light, your spatial dimension in the forward direction shrinks down to nothing and your clock slows to a stop.
A reference frame with zero width and with no progression in time is really a reference frame that does not exist. There is a maximum speed limit in our universe. This maximum speed limit of causality is necessary in order to have the world as we have it.
So in principle it is possible to have a world with infinite speed, it's just not ours and it would look completely different than ours.
And in our world with an upper limit of the speed of causality everything which doesn't have a mass can travel as fast as this limit. It is true therefore that the speed of light is the maximum speed in our universe. However, this is because there is an upper speed limit and the photons have no mass which allows them to travel that fast.
Take a floating balloon and start adding hanging weights. For a fixed weight there is a terminal velocity , dependent of the size and weight of the balloon-weight system. This can be explained by the reaction of the air to the force of the weight. Then explain the elementary particle concept, it is elementary particles that cannot get a speed greater than the speed of light. Particularly that light is made up of photons, and the photon is also an elementary particle. All matter is made up by these elementary particles and therefore no matter can go faster than c.
For mathematical descriptions one can show triangles and other geometrical figures, a maize for example constrains motion and the constraint can be described by geometrical figures. Go back to the balloon. We know that there is a limiting velocity because of the air and the forces.
Analogous to the terminal velocity of the balloon the faster it is pushed the more resistance it finds from the intrinsic structure of the space itself. The terminal velocity for the space and time we live in is the value of c, the velocity of light in empty space.
Because of the equivalence of energy and mass,the energy which an object has due to its motion will add to its mass. In other words,it will make it harder to increase its speed. As an object approaches the speed of light ,its mass rises quickly,so it takes more and more energy to speed it up further. It can never in fact reach the speed of light,because by then its mass would have become infinite,and by the equivalence of mass and energy ,it would have taken an infinite amount of energy to get it there.
For this reason any normal object is confined to move at speeds lower than the speed of light. To put it very much simply and in a funny way:just tell him that you get fatter and fatter if you move faster and faster and hence you wont be able to go any faster where as Light doesn't get fatter and that's why it is the fastest and you can't beat it.
From that, it's explain everything, from paradoxs, differences from inside and outside, and extra cost of the last "pushes". I think a good way to approach this is as follows: An object moving at some finite speed needs to have a speed relative to something. This is not the case with the speed of light. When something moves at the speed of light it does so relative to everything. Now, start rotating the velocity arrow under the assumption that all objects move at the speed of light in spacetime.
Suppose the velocity arrow is pointing entirely in the time direction, it means that the object will move entirely through time and not through space. Next, rotate the arrow toward the horizontal space direction and as the object is rotated closer and closer to the horizontal axis, the higher and higher is the velocity through space.
At the same time, we have less and less velocity in time. When the arrow is pointing horizontally, the velocity is entirely through space. All of the speed is through space. This analogy also illustrates that an object moving extremely fast through space moves very slowly through time.
Hence, an object moving at the speed of light through space experiences no time at all or in other words is frozen in time. And this is a more accurate reason than the reasoning of changing masses. Learn more about can you go faster than light? Particles can be accelerated at nearly the speed of light using electromagnetic fields, magnetic explosions, and wave-particle interactions. The theory of special relativity explains how space and time are related for objects moving at a constant speed.
As this particle is moving faster than light in water , it will generate copious light photons that are in phase with each other. The result is a pervasive glow called "Cherenkov radiation," after Soviet radiation physicist Pavel Cherenkov who first observed this glow in One can think of this radiation as the light equivalent of a "sonic boom," that one hears when objects move faster than sound. So, it is possible for objects to move faster than light in media other than a vacuum.
We hope this response proves helpful. Fall at the University of Southern Maine.
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