Relativity, time dilation looking intio the past for less than c phenomena?

Question

Since the ~30 years from my birth sound waves (from my first movements and cries) have travelled 325,346,400km - or about 1000 light seconds.

Light from me (my light cone) has travelled 30 light years.

Now I believe that from my frame of reference, the light has not experienced the passing of time - is that right? - but the sound has (as time slows down as one approaches light speed.

Anyway, just as light reaching us from stars light years away tells us about what has happened in the past, if we could reverse the light from my birth, in it's direction (say by a hypothetical but improbable mirror), in 30 years time we would see the event over again - and be looking back 30 years into the past.

But with the sound, if we could encode it's information into light wavicles, we would be looking only 1000 seconds into the past - or so it would seem.

It this apparent oddity explained by the faster rate at which time passed for the sound (ie. less time dilation)

or (more passage of time) would have to be incorporated into the calculations, eventually telling us that we were "looking as sounds" that happened 30 years ago and not 1000 seconds?

I hope I make sense and have a clue.

Answer 1

From our frame of reference (being on earth) the light has traveled 30 light years. Sound on the other hand can not travel past the earth since it needs a medium to pass through like the earths atmosphere.

If you were to get in a space ship that could approach the speed of light for the past 30 years trying to keep up with the light waves then, yes there would be time dilation between the earth and the spaceship. From the spaceships frame of reference the earth would appear to be moving slower where as from the earths frame of reference the people on the ship would appear to be moving slower. If the ship were to stop turn around and come back the ships clocks would lag behind the earths clocks.

Answer 2

You have a poor understanding of how sound travels, you are correct about light not being influenced by time. You always look into the past, reflections from a mirror are changed in this respect. Everything is a jumble of nonsense.

Answer 3

???
I'm not really sure what you're asking. But if you encoded sound onto the light, you'd have 30 years of sound encoded onto 30 years of light which would then 'play back' over the course of the next 30 years.

HTH

Doug