If an arrow goes through your head at the speed of light, will you die?

No, at the speed of light, the space the arrow would occupy is everything, therefore I'd only be hit by an infinite fraction of the arrow, ergo nothing would be felt, noticed nor seen. Furthermore, the arrow would take an infinite amount of time to get anywhere, although it would, from the arrows point of view, still move at the speed of light.

[edit]: After having read all the other posts, I realize that I need to bring some proof of my statement since everyone are making a clueless guess. Thusly, I present to you a link to wikipedia, which fortunately validates my school/university teachings. If you search for the Lorentz Transformation (the factor of which an object stretches in relation to its velocity), you will find that at low speed this factor is very close to 1 (meaning no noticable change in stretch). Though, at a speed infinitely close to the speed of light, the factor also reaches infinity, meaning the object will have an infinite size (but not infinite mass), which means that the atoms of the arrow will hit everything at once, causing its finite momentum (movement energy) to be exerted upon every single atom in the entire universe. Not only does this mean that an arrow with the velocity of light cannot hit a single target, but it also means that nothing will notice anything other than the arrow suddenly disappearing. Furthermore, special relativity states that nothing can achieve the speed of light within a finite time-frame, making you question very theorical.

I would also like to point out the sheer lunacy of the average 'answerer' here on Answers. If you take my answer as being truthful, which you should given the high support within modern physics (which I am also a student of), you would notice that only a small fraction of the members of Answers aren't guessing cluelessly. This is quite sad, and I advice you to regard every answer with suspicion, and use google/wikipedia for valification.

This is a huge theoretical question. This is not only a Physics question but a Medical question. If for example it went through your head in a superficial way (such as just a centimeter below your scalp) then you perhaps would not be killed. If the arrow was launched from any appreciable distance at all, then I think the arrow would probably disintegrate due to friction before it reached your head. The molecules and atoms that comprise the arrow would be bumping into alot of atoms and molecules that make up the atmosphere (assuming the arrow was not fired in a vacuum). If it was fired in a vacuum, then the lack of air would kill you perhaps before the arrow did even if it was fired at close range. There are simply too many undefined variables that prevent this question from being definitively answered.

It also depends on the size of the arrow.There was a man recently who got high on methamphetamines and fired a nail gun repeatedly into his head. When he came out of his drug induced fog, he did not realize what he had done and went to the hospital complaining of headaches.The X-rays showed all the nails in his head.

Finally there is a Theological aspect to your question. If it is your time to die, then you will die even if it is from something such as a cell phone induced tumor in the brain.

depends on how big and massive the arrow is, because, every time millions of billions of cosmic rays (may be neutrinos too) are passing through your body at the velocity of light. perhaps a suitable arrow can be designed to let it do. Mind that no materials can approach the velocity of light!

Yes. If the theory is true that E=MCsquared is also true in reverse - that energy can become matter, then either the arrow, or the 'energy-matter' will create significant disturbance through your cabesa.

no, why this is bcos at the speed of the light u wont feel it has passed b4 u can b able to get to know anything has passed thru ur brain or skull, however it may cause u pain later when u discover, however u may die later due to internel bleeding cos u may nt know anything has happen to u

Probably, but what a fantastic way to go. A streak shooting through your brain at 186,000 miles per second. How big would the bow have to be to generate that sort of energy. Wow!

NO YOU WONT DIE BECAUSE THE ENERGY YOU CREATE WOULDN,T DIE, AS A HUMAN, YES YOU WOULD CEASE TO EXIST BUT YOU WOULD CREATE A WONDERFUL BLACKHOLE WITH ELONGATED SPAGETTIFICATION AND ALL YA MATES AND LOCAL BYSTANDERS WOULD THEN FOLLOW THE PATH OF THE ARROW AND BE SUCKED THROUGH YA EYESOCKETS AND THAT WOULD BE WELL COOL...LET ME WATCH!!!?

yes i'l die caus nomatter whatever the speed is the arrow will go throuth my head making a hole in it..and i surely cant be alive then!!

Yes. If it pass directly through your brain.

Sure ...

An arrow gonnam still an arrow whether its at 3m/s or at 300000Km/s ...