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Subject: Re: You use different lenses underwater because the speed of light is different



"In their laboratory, Hau and her colleagues have been able to slow a
pulse
of light, and even stop it, for several-thousandths of a second.
They've
also created a roadblock for light, where they can shorten a light
pulse by
factors of a billion.


"This could open up a whole new way to use light, doing things we could
only
imagine before," Hau said. "Until now, many technologies have been
limited
by the speed at which light travels."


The speed of light is approximately 186,000 miles per second (670
million
miles per hour). Some substances, like water and diamonds, can slow
light to
a limited extent. More drastic techniques are needed to dramatically
reduce
the speed of light. Hau's team accomplished "light magic" by
laser-cooling a
cigar-shaped cloud of sodium atoms to one-billionth of a degree above
absolute zero, the point where scientists believe no further cooling
can
occur. Using a powerful electromagnet, the researchers suspended the
cloud
in an ultra-high vacuum chamber, until it formed a frigid, swamp-like
goop
of atoms "

A perfect example of a reporter not having a clue, and then people
mis-understand what exactly is going on.

This article refers to the "slowing down" of a PULSE of light, not THE
SPEED OF LIGHT.
They are two very different things. The reporter is unquallified to
wrie on this subject.


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You use different lenses underwater because the speed of light is different =>Re: You use different lenses underwater because the speed of light is different =>Re: You use different lenses underwater because the speed of light is different =>Re: You use different lenses underwater because the speed of light is different =>Re: You use different lenses underwater because the speed of light is different =>Re: You use different lenses underwater because the speed of light is different =>Re: You use different lenses underwater because the speed of light is different =>Re: You use different lenses underwater because the speed of light is different =>Re: You use different lenses underwater because the speed of light is different =>

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Re: You use different lenses underwater because the speed of light is different

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