There's also the fact that this pressure difference is applied in a nanosecond or so. That would create a nice mechanical shock wave.
Probably you're right though and that's not enough to do any damage. A lot of different forces are at work at once in the target spot, and the thermal effects usually outweigh momentum and EM effects by orders of magnitude. But given enough power and sufficient small target area, radiation pressure could get sufficiently large to puncture the hull.
In theory anyway;-)
Each photon in the beam transfers its momentum to the target. For total reflection it transfers twice its momentum. This will result in radiation pressure exerting a very localized force (so high pressure), and if there is any absorbtion it will heat up the material locally, causing a temperature shock, since the immediate surroundings don't get time to heat up.
A laser that powerful would convey enough impulse to make a hole without needing to heat the target. That fact aside, the slightest absorption would vaporize the mirror anyway.
Also "temperature-stability" : I'm sure if you light a match to it, these carbo nanotubes will have no problem oxidising to carbondioxide. So they're only stable in a very carefully controlled environment. And even then they will degrade because of cosmic radiation.
YES
You've just shot yourself in the foot.
Do you want me to call an ambulance? YES
Clippy is calling an ambulance. Allow or Deny? A
Windows has detected a process tried to use the modem to dial out. This is suspicious behaviour often caused by viruses or malware. Therefore it has been blocked.
When observer A measures the electron at his side to be X-aligned, he will measure that 50% electrons are aligned and 50% are not. He has no control over what he will measure. He can just setup the test an observe that electrons are aligned or not.
Observer B will setup the same test on her side. Suppose she checks the same alignment as observer A, then she will also observe that 50% of the electrons are aligned and 50% are not.
When A measures an X-alignment, B will measure a non-X-alignment for the same electron. But because B doesn't know what A measured, because that's random, there is no way to use this to exchange information. Only when A and B later meet and discuss their results, they will find that A observed a sequence of alignments, and B observed the opposite sequence.
You seem to suggest that there is no instantaneous interaction going on. That would mean that there are local hidden variables. However, these can be disproven by analysing the results of the experiments statistically: see Bell's theorem .
I predict that within 100 years, these motors will be twice as powerful, ten thousand times larger, and so expensive that only the five richest kings of Europe will own them.
Well, it all depends on which calendar you use. The Gregorian calendar wasn't introduced until 1582 AD, and so there where no actual leap years before that date.
If one would extrapolate the Gregorian calendar into the past (the so called Proleptic Gregorian calendar) then your formula would give the correct answer.
Might be for testing. I sometimes use "if (false) { }" in Java to disable code parts in such a way that the code is still compiled (and so that Eclipse doesn't remove imports for this code). Otherwise, might be to limit the scope of local variables. A bare block "{ }" does the same, but might feel too awkward to some people. Might be useful to reclaim memory as soon as possible in long methods, although putting the code in a separate method would be better probably.
Slashdot Mirror
There's also the fact that this pressure difference is applied in a nanosecond or so. That would create a nice mechanical shock wave. ;-)
Probably you're right though and that's not enough to do any damage. A lot of different forces are at work at once in the target spot, and the thermal effects usually outweigh momentum and EM effects by orders of magnitude. But given enough power and sufficient small target area, radiation pressure could get sufficiently large to puncture the hull.
In theory anyway
Each photon in the beam transfers its momentum to the target. For total reflection it transfers twice its momentum. This will result in radiation pressure exerting a very localized force (so high pressure), and if there is any absorbtion it will heat up the material locally, causing a temperature shock, since the immediate surroundings don't get time to heat up.
A laser that powerful would convey enough impulse to make a hole without needing to heat the target. That fact aside, the slightest absorption would vaporize the mirror anyway.
It rather reminds me of this one: http://www.xkcd.com/313/
Yeah, but for all we know you're eleven now ;-)
You're too kind. The 'meat' only contains at most 20% meat...
Killing all trees with acid rain in the process...
No problemo. I'll just use emacs then.
Make that "carbon nanotubes" and "carbon dioxide". My keyboard is eating my letters. Yeah, I'm sure that's what happened ;-)
Also "temperature-stability" : I'm sure if you light a match to it, these carbo nanotubes will have no problem oxidising to carbondioxide. So they're only stable in a very carefully controlled environment. And even then they will degrade because of cosmic radiation.
YES
You've just shot yourself in the foot.
Do you want me to call an ambulance?
YES
Clippy is calling an ambulance. Allow or Deny?
A
Windows has detected a process tried to use the modem to dial out. This is suspicious behaviour often caused by viruses or malware. Therefore it has been blocked.
Not birds, but bats...
You are missing the real problem here.
When observer A measures the electron at his side to be X-aligned, he will measure that 50% electrons are aligned and 50% are not. He has no control over what he will measure. He can just setup the test an observe that electrons are aligned or not.
Observer B will setup the same test on her side. Suppose she checks the same alignment as observer A, then she will also observe that 50% of the electrons are aligned and 50% are not.
When A measures an X-alignment, B will measure a non-X-alignment for the same electron. But because B doesn't know what A measured, because that's random, there is no way to use this to exchange information. Only when A and B later meet and discuss their results, they will find that A observed a sequence of alignments, and B observed the opposite sequence.
Correct link: Bell's theorem
You seem to suggest that there is no instantaneous interaction going on. That would mean that there are local hidden variables. However, these can be disproven by analysing the results of the experiments statistically: see Bell's theorem .
They tried a GUI for it, but it was useless without a mouse (the cats kept eating the mice).
But remember: all wireless basestations connect to the wired network...
I predict that within 100 years, these motors will be twice as powerful, ten thousand times larger, and so expensive that only the five richest kings of Europe will own them.
There's a window in your basement? You're so lucky...
Well, it all depends on which calendar you use. The Gregorian calendar wasn't introduced until 1582 AD, and so there where no actual leap years before that date.
If one would extrapolate the Gregorian calendar into the past (the so called Proleptic Gregorian calendar) then your formula would give the correct answer.
No it isn't. It is equivalent to year%4 (the result of the AND is 0..3).
And also: according to your function, 64 is a leap year...
That's not a knife... That's a knife!
Might be for testing. I sometimes use "if (false) { }" in Java to disable code parts in such a way that the code is still compiled (and so that Eclipse doesn't remove imports for this code).
Otherwise, might be to limit the scope of local variables. A bare block "{ }" does the same, but might feel too awkward to some people. Might be useful to reclaim memory as soon as possible in long methods, although putting the code in a separate method would be better probably.
This should silence your doubts...
That hasn't stopped them before...