what's a keton?

Question

I heared if a paticle moves faster than light it's called keton and there would be a blue line in the space. can anyone explain?

Answer 1

I have no idea what your source is talking about, but the only hypothisised particle I'm aware of that is supposed to be faster than light is a Tachyon.

Since it's faster than light, if you were to observe it, assuming you can see particles, you would see it first as it was closest then it would seem to move away in both directions.

Since sight is based on light, light has to bounces off it for you to see it. Ignoring the obvious problems in bouncing light off a particle, I'll move on.

Since light moves at a fixed speed, and what you are observing is moving faster than light can, it will pass the image of itself as the image travels towards you and continue passing images of itself. When it is closest, the light reflecting off it has the shortest distance to travel, it will get to you first. Then the image of it on both sides of it's trajectory from the closest point will hit you, then the next image further and so on. However, it would be deceptive in it's direction of travel. Since the light in the direction it's comming from would have a headstart on the light from the direction it's going, it would seem slower.. but in the direction it's actually going.

Man, physics is such a trip.

What blue has to do with it, I'm not sure. Maybe he's talking about blue shift? But that would only occour as it was traveling towards you and a redshift away.. but it's not a SOURCE of light, either, so that wouldn't really apply.

Answer 2

Tollen's Reagents does'nt work on keton.

Answer 3

You may be thinking of a Tachyon. Which is not an experimentally observed feature of the universe.

The Tachyon is strictly theoretical, but read up on it simply by typing 'Tachyon' into Wikipedia.