Can someone explain about the condition when light can reach faster than it constant?

Answer 1

Light can not travel faster than, well, lightspeed. Now, that doesn't mean that two objects can't move away from each other at faster than the speed of light. What I mean by this is that two objects traveling very close to the speed of light in different directions can create a gap that expands faster than light travels.

Basically, two fast moving and oppositely directed particles can create a space or a gap between them that expands faster than the speed of light. The two particles are not traveling faster than lightspeed, but the distance between them is growing faster than lightspeed. I know this sounds like it's not allowed, but the particles are moving slower than lightspeed, the gap is just expanding that rapidly. There is nothing in the gap that is moving and the gap is made of nothing, so the laws of physics are preserved.

Hope this helps.

Answer 2

I may be able to shed some light on your question.

When talking about light waves there are two different speeds that we use. They are phase velocity and group velocity. The phase velocity is the speed at which a particular point on the wave is moving. The group velocity is speed at which the entire wave is moving.

In some cases the phase velocity can be faster than c. This happens alot in a plasma. This is OK, because the phase velocity is really just a mathematical tool that helps describe wave behavior. There is actually no physical particle that is traveling at this speed. However under no circumstances will the group velocity be faster than c. And this the velocity that light travels at.

Answer 3

I'm not entirely sure what you're asking, but I think its something like "when does light travel faster than its normal constant speed".
Well, we know that light always travels at a constant speed, ~300,000 km/sec. It never actually travels faster than that, but under certain conditions it can appear to. In a cesium-gas filled chamber, light actually travels faster than itself. About 310 times faster, in fact. I believe the explanation is that cesium affects the properties of light. I don't know enough about it to say how exactly, but I believe it has something to do with changing the amplitude, frequency, or somesuch...

Answer 4

There are particles that move faster than the speed of light -- that's only possible when they were already created moving faster.

Light can move slower than the official speed depending on what it's moving through; the official speed is for when it goes through a vacuum.

But I'm not aware of any cases of light moving faster than the official speed. Are you sure you got that right?

Answer 5

E=mc2 energy, mass, light (In a vacumn) in comparison to time, is Einsteins theory on relativity. My understanding was that light travels at a constant speed, I think it is measured in miles per second However,if the vessel is a car, that a torch is being carried in travels faster,. dependant on the m.p.h, speed of the car.that is added to the constant that is the speed of light.The nearer you are to the fast moving car,the faster the beam will be travelling, dependant on two things the distance you are from the m.p.s. of the torch beam and m.p.h. of the car speed. I hope that helps,

Answer 6

2 of the papers communicate some diverse velocity of sunshine interior the moments after the vast Bang. by using fact that there have been no stars at this factor it has actual little need in explaining mild that seems to come lower back from hundreds of thousands or billions of sunshine years away. the different 2 take care of the version of the fee of sunshine by using diverse mediums...which has no longer something to do with the fee of sunshine in the time of the vacuum of area. subsequently the universe isn't youthful... be at liberty to maintain attempting inspite of the shown fact that.