why does the time dilation occurs at speed of light?

Question

i know that according to theory of relativity time dilation happens at speed of light but y it happens? plzz explain me in easy format and simple terms.

Answer 1

because the faster you move the more things you can do in a second. lets say you're traveling at the speed of light, it would take you less than a second to go around the world at the equator once. It would take an airplane several days to do that assuming it had enough fuel to last the trip. So if you raced the airplane and both of you started at the same point at the equator then by the time you finished going around the world the airplane would still be in the same place as if it never moved.

Answer 2

In the simplest form.

Eisenstein postulated(an assumed truth) that the speed of light is constant.

To describe the time dilation he proposed the "light clock",

Imagine you had a clock made of 2 parallel plates and a "ray" of light bouncing back and forth between the plates.

now imagine that a passenger took this clock with him/her on a ship and traveled really fast,
again you would simply see the "ray" move back and forth.

however an observer watching your ship traveling really fast will see the "ray" not only go back and forth but also in the direction you are traveling making a triangular path of travel.

as the triangle path is a longer path than simply back and forth and the light travels the same speed for both observer and passenger, the passenger would count lets say 2 seconds for the "ray" to travel back and forth whereas the observer would count lets say 3 seconds for the "ray" to travel the triangular path.

here the passengers time was dilated to 2/3 of the observers time, the faster the travel of the passenger the larger the dilation, (the dilation can be calculated by working out the difference in path length of the passenger/observer's "ray").

if however you travel at the speed of light the equation breaks down as the triangle now has a slope of 1/0 which is undefined.

This is why time dilates and why it is believed traveling the speed of light is not possible.
(not being able to travel the speed of light is not a postulate it is just mathematically undefined)

Answer 3

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Here's a different way of explaining relativity. It is not new, just not the way it's usually explained.
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Everything in the universe is always moving at the speed of light, to any observer at right angles to your time vector.
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Remember, according to Einstein, we live in a 4-dimensional universe (at least 4, there may be more dimensions.) We are traveling at the speed of light right now, in the 4th dimension, the time dimension.
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This is exactly how and why time changes at near-lightspeeds. Think of being on the freeway, and looking out the window at the car next to you. It appears to be still, even though you are both traveling at 60mph. Think of this as traveling through the time dimension. When you take the off-ramp, and look behind you, that car is now speeding past you. This represents time passing at different rates for each of the cars, because you have now altered your path away from your former time vector.
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In this view, there are no speed changes, just direction changes. You have changed your motion vector from the time direction to one of the spatial directions (which becomes your new time vector if you go fast enough.)
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Why does everything move at lightspeed? E=Mc2. We are all made from energy. We move at lightspeed because we are made out of light.
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Answer 4

see it is at the speed of light the time slows for the person travelling leading him to the future but if ur speed increses than of light u will be in the past .amazing!!!!!!!!!

for more i suggest to buy a book and read

Answer 5

when the speed of the observer or his reference frame is not too much smaller than the speed of light.this is one of the results of the Special Theory of Relativity. due to Einstein.

Answer 6

The simplest way to put it is,
Sunlight from sun, travelling at a speed of light to earth, when sun is nearer the earth, as in summer, lengthens day time..
Sunlight from sun, travelling at the speed of light to earth, when is farther from earth, as in winter, shortens the day time.
Theoretically assuming that the sun is always equidistant from the earth, TIME HAS TO EXPAND TO GIVE MORE DAYTIME IN SUMMER &SHRINK IN WINTER TO GIVE LESS DAYTIME IN WINTER.