What is Spacetime?

[BigP]

Thanks SuperNova.

I have read it a few times.
Will think on it more with other questions.
You are going well.

So, if I am running away from you at the speed of light (maybe due to a good backwind, or a downhill section), it might be hard for you to see me.
The light shining onto me cannot touch me as I am going the speed of light.
There is no reflected light.

I think you will find that light always hits you at the speed of light even if you were traveling the speed of light, I may be wrong on this and im quite happy to be corrected

Im thinking this would have something to do with the wave/particle duality of light

[Super Nova]

Thanks SuperNova.

I have read it a few times.
Will think on it more with other questions.
You are going well.

So, if I am running away from you at the speed of light (maybe due to a good backwind, or a downhill section), it might be hard for you to see me.
The light shining onto me cannot touch me as I am going the speed of light.
There is no reflected light.

I think you will find that light always hits you at the speed of light even if you were traveling the speed of light, I may be wrong on this and im quite happy to be corrected

Im thinking this would have something to do with the wave/particle duality of light

So, if I am running away from you at the speed of light (maybe due to a good backwind, or a downhill section), it might be hard for you to see me.
The light shining onto me cannot touch me as I am going the speed of light.
There is no reflected light.

Again a situation that cannot occur (you cannot be at the speed of light) but if there is a is a large distance and we take into account the universe is expanding then you could be going away from me at greater than the speed of light. In this case no photon sent from me will reach you and any photon you emit would still travel at the speed of light. Light would reach me, red shifted. If the space you are in is moving away (due to expansion) faster than light I suspect the light will never reach me. We are taking a very long time in this scenario.

I think you will find that light always hits you at the speed of light even if you were traveling the speed of light, I may be wrong on this and im quite happy to be corrected

Again if you travel at the speed of light, no mass can do this. If you move away from me at the speed of light, no light from me will every reach you. Just under the speed of light, my light will reach you and be absorbed and remitted at normal. I would epect the photo from me would appear very elongated, therefore long wave length and therefore low energy. If it ws re-emited in a different direction what would be the wave length/fquency energy. I don't know. This one I don't know the answer to. Good question.

What woudl happen to the reflected/absorted and released photon. Would the direction of the photon affect it's energy... bla bla.

Mind numbing in't it.

[sprintcyclist]

What is red shift ?

[boxy]

My opinion is that there's no physical thing that will be called spacetime. It's simply a model to help our mind understand the interactions of forces, matter, etc..

[BigP]

My opinion is that there's no physical thing that will be called spacetime. It's simply a model to help our mind understand the interactions of forces, matter, etc..

Next you'll be telling us there is no such thing as "dilithium crystals" lol