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Comment Re:Hmmm .... (Score 1) 127

In Europe we're starting to move our GW detection into space with a Laser Interferometric Space Antenna (Lisa). To start with:

...Pathfinder's job is to prove the metrology.

To do this, it will try to put two small gold-platinum blocks into a perfect free-fall and then track their relative movement using lasers.

The intention is to get these blocks following a line that is defined only by gravity. To do that requires that all other forces that might interfere with the demonstration are removed.

This means, for example, carefully controlling the influence of temperatures and magnetic fields. Even the vacuum state will introduce "noise" into the system if some residual gas molecules are allowed to collide with the blocks.

The experiment has been designed such that disturbances to the blocks as small as just a few picometres should be noticed. One picometre is a small fraction of the width of a hydrogen atom.

Comment Re:Missing the problem by a mile (Score 1) 564

And it's also the "Content-type" header in HTTP that determines the how your browser will render the content.

Wrong, you can create a javascript file with a .php extension (or .jpg extension) and include it with a <script src="foo.php"> tag and the browser will treat it as any other js file regardless of any headers sent by the server.

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