Scenario 1: The car travelling at speed of light with it's headlights on. Can we see the light from the headlights? Given that the light coming from the headlights can't go faster than the speed of light, aka the car, it won't ever get out of the headlights so long as the car is travelling at the speed of light. In other words, we would never see the car, or the light, until it hit us.
Scenario 2: A car travelling at the speed of light turns flicks its headlights, and the accelerated beyond the speed of light. Assuming the car is completely transparent, it will arrive at the wall before the light does. Otherwise the light energy is absorbed by the car passing through it and it is never seen. At least, that's my interpretation.
Scenario 3: You would hear the individual footsteps. No matter how quickly the Flash travels, the sound of his footsteps all travel at the same velocity, arriving at your ears in the order they were made.
I would expect that the footsteps would interfere with one another to at least some extent, would they not? It clearly depends on HOW MUCH faster than the speed of sound the Flash is traveling, and how long his strides were. You'd hear his closest footsteps first, being that the flash made that sound before his next-closest step's sound wave had made it to that point, but I think that they overlap would eventually turn it into a dull roar type thing
Re: Doppler?red_clawsFebruary 9 2004, 21:24:41 UTC
Oh, okay, I see what you mean. That's not really a doppler, though...doppler has to do with frequency.
But for all the footsteps to coincide...Flash would have to be travelling at EXACTLY the speed of sound, not above it. Because otherwise the sound of the footsteps don't overlap each other. You'd still hear them seperately otherwise.
I find this remarkably funny because normally I would inclined to puke all over any blog entry with the title "A conversation with my boyfriend". We are such huge nerds and this is why I love you guys.
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Scenario 1: The car travelling at speed of light with it's headlights on. Can we see the light from the headlights? Given that the light coming from the headlights can't go faster than the speed of light, aka the car, it won't ever get out of the headlights so long as the car is travelling at the speed of light. In other words, we would never see the car, or the light, until it hit us.
Scenario 2: A car travelling at the speed of light turns flicks its headlights, and the accelerated beyond the speed of light. Assuming the car is completely transparent, it will arrive at the wall before the light does. Otherwise the light energy is absorbed by the car passing through it and it is never seen. At least, that's my interpretation.
Scenario 3: You would hear the individual footsteps. No matter how quickly the Flash travels, the sound of his footsteps all travel at the same velocity, arriving at your ears in the order they were made.
That's my take.
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But for all the footsteps to coincide...Flash would have to be travelling at EXACTLY the speed of sound, not above it. Because otherwise the sound of the footsteps don't overlap each other. You'd still hear them seperately otherwise.
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