Does time stop at the speed of light ?

That's what einstein told in his theory of relativity.. and emphasis on the word 'relativity'.. when an object moves at the speed of light, time is supposed to stay stationary for that body alone.. the time doesn't move relatively when compared to other bodies.. so if a body moves faster than light, we wouldn't be seein the light travelling at a speed of infinity or anything.. it is all relative..

Does time stop at the speed of light ? YES

..it also means photons ... do not age NO

electrons do not age WHAT!?!?!

and the light ... is said to reach us instantly . SAID BY WHO??????? ridiculous!! and not true.

If it is true then the speed of light should be infinite and not 300,000 km/s. REALLY? WHY?

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You should really get your facts straight before asking questions. You claim that electrons travel at the speed of light. They do not. Nothing with (rest) mass can travel at c. The fact that electrons have weight is High School Physics.

In Special Relativity the distance between two objects is d = d°√(1-v²/c²) where d° is the distance measured in the coordinate system where both objects are at rest (rest frame).

When v = c, 1-v²/c² = 0 and the distance between points is zero. It takes light no time to travel no distance.

For some reason you have not understood the basic fact about Special Relativity: Time is relative to the coordinate system in whihc it is being observed. So is speed. So is distance (obviously it must if time and speed are).

Until you understand it, you can not make inferences based on it, can you?

I will tell you what I do not understand about this. Because the Universe is expanding, light is red shifting. That means light is changing. Something timeless should not change. This doesn't mean the theory is wrong, it simply means that I do not understand this aspect of it. (I'm not a physicist).

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By the way, if you want to deserve any respect here, you should never write "it is said" unless you can back that up. Otherwise we will just think you are a fool or a liar.

>When it does stop it also means photons ,electrons do not age

Electrons do not move at the speed of light. They move very fast, but not that fast.

As for photons, essentially yes, they do not age.

>the light which is produced when a supernova occurs is said to reach us instantly .

From the light's point of view, yes. You could also say that from the light's point of view, the location of the supernova and the location of our eyes are one and the same.

>If it is true then the speed of light should be infinite and not 300,000 km/s.

No. And that's the weird thing. We would expect it to be, but it isn't. Our intuitive newtonian understanding of space and time isn't how the real world works. In the real world, particles moving at (roughly) 300000km/s experience time coming to a stop and space compressing into a flat plane. It's weird and counterintuitive, but it actually happens.

Time does not exist for a photon. The Universe could possibly contain only a single photon. Since a photon has no time to contend with one photon can instantly be everywhere at once. Time does not stop for things reacting with that photon. They still measure the photon moving at 300,000 km/s.

In the reference frame of the photon time does not exist, so a photon does indeed not recognze the passing of time. No matter where a photon originates, it's travel through space in its own reference frame is instantaneous. However, in any other reference frame, the speed of the photon is limited to 3 x 10^8 m/s. It is confusing, I know. But you must learn to think in terms of reference frames. Once you understand that concept, you will be golden.

Time is standing still from the viewpoint of the photon, but not for us. For us a photon travels with 300,000 km/s. That's what relativity means: Time and space are not absolute but relative to the system they're measured in.

Take this answer into consideration as I will try to draw out an example for you.

Let's say that I were to take a rocket ship and travel at the speed of light for let's say three days standard Earth and general time. By the time I would return after my three days of time, I would come to Earth entirely incapable of moving and be in an infinite state of petrification or I would be still the same functioning normally but be in a different era of time and never die. Presumably the equation stated Time x speed of light(photon arrangement). Now take the concept of the fourth dimension into this reasoning ok? We see this dimension as an illusion which is practically what time really is. So now the concept of two different eras living in complacent times but with one altered at the speed of light is a concept unviable to our universe in its given state. This would require a 12th and 13th dimension in order to take place. This is generally why Einstein said that there is no way to travel at the speed of light as we would open up a new concept of unimaginable reality.

Theoretically, yes.

However, it is impossible for any particle with mass to move at the speed of light.

Particles, tachyons, that move fast than light should move backwards in time.

The only time atoms stop moving is at absolute zero.

no, only when the battery runs out in your watch.