The plane would definitely crash at impact.
The old airplane on a conveyor...
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Neither would see it first as at those velocities the light would be bumped up to the level of gamma rays, to which the human eye is unresponsive. However, the gamma rays would reach each end of the train _at the same time_ because both sets of gamma rays are still traveling at the speed of light. The only detectable difference to an observer in the middle would be higher frequency gamma rays at the oncoming end, and lower frequency gamma rays at the receding end, due to Doppler shift.
Ok, pop quiz: The sun goes out. Just goes completely dark. Would Earth immediately lose all it's light?
Would there be a delay before the sky went dark?
How long?
Why?
Would there be a delay before the sky went dark?
How long?
Why?
Excellent answer!
It was quite "relative" to the problem.
Now for a bonus question!
If I'm standing beside the train as it passes by, how far apart are the two men from each other from my perspective? From their perspective?
8 minutes. But the moon would still be bright in our sky for another second or so.
Why? Our distance from the Sun divided by C.
The only wronkle is that IF the plane were already traveling at the speed and in the direction of the conveyor, it would need to overcome that FIRST before it gained enough thrust to takeoff. But it still takes off.
I don't think a prop job getting airborne in the experiment proves a 747 would. The prop is generating airflow over the wings and generating thrust. If the plane is held stationary by a treadmill, no lift, the wheels can spin as fast as they want. 747 thrust is not even close to gross weight.
An electric train is moving North at 60 mph and the wind is blowing South at 40 mph. Which way does the smoke travel?
Huh? So, how do they get rolling from a dead stop on a real runway? Besides, the plane ISN'T being held stationary by the treadmill. That's the whole point.
There is literally no difference between a prop or jet engine in this scenario. Both the prop and jet engines generate thrust which push the plane forward, which the forward movement in turn generates the lift. The wheels spin freely on the landing gear.
Traveling at the speed of light is impossible. Theoretically, we would be at absolute zero the entire time, but never achieve it. The question about traveling at the speed of light would be nothing more than a set of theories that could never happen, nor be proven.
Hmmm..
This is an interesting question, I've never even considered that before.
Snover, does gravity move at a specific speed? I'm gonna text a friend who might know this answer.
Which is why all the text book word it as "near speed of light" or .9c, something like that. Just stupid scenarios to illustrate special relativity, Lorentz transformations, time dialation, etc. The effect still come into play well below speed of light and definitely do happen and can be proven. The corrections needed for GPS is the usual everyday example.
Gravitational waves are finite energy waves and therefore move at the speed of light as far as my understanding. If you want to get really picky you would technically receive the gravity first as the light would be slowed in the atmosphere. I could be over looking something though.
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I googled it and wow! It is basically a crappy question and it depends how and in relation to what the treadmill is spun. I view it as the treadmill magically allows the 747 to be stationary with zero ground speed. Zero ground speed means zero lift and hence the plane will not takeoff. F22 would take off, it has greater than 1 to 1 power to weight ratio. That would be something to see.
Gravity is acceleration, so yes and no.
If it's on fire, most likely up.
Gravity isn't acceleration, it causes objects to accelerate. Gravity is a force that draws two bodies towards each other. It is believed its caused by the higgs boson.
My buddy replied about the speed of gravity, apparently it's the speed of light according to Einstein.
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