Comments on 'Tricorder' Ready For Mars Rover This Year
A little pocket-sized device that can instantly determine the composition of any material? Sci-fi hogwash! Or is it? (Read
the complete story)
(CyberStrike 3/13/2006 8:35:44 PM)
|"Could the tricorder be used to detect explosives under a road or bridge? Such a device could save a lot of lives from booby traps."
( 3/24/2006 6:55:17 AM)
|"Could a scaled up, airborne version of a Raman laser spectrometer be developed ?
If so it could be a very useful countermeasure against IEDs in Iraq. "
(MR 3/29/2006 10:10:39 PM)
|"It looks as though there may be a bit of the "cart before the horse" in this article. The fifth paragraph states, "The Raman spectrometer is based on a technique developed by Sir C.V. Raman, an Indian physicist who won a Nobel prize in 1930 for the discovery. Unlike most methods of conducting an analysis of a material, it does not require destructive testing. By firing a laser at the sample, atoms are excited, which then emit a very weak light with a pattern characteristic of the material." However, the laser was only proposed as a variation on the maser principle in the late 1950's, and was first successfully demonstrated in July 1960. What was Dr. Raman using?"
(Anon 3/15/2007 4:45:15 AM)
|"I think Raman's first experiments demonstrated the effect using filtered sunlight as a monochromatic source of photons, a colored filter as a monochromator, and a human eye as detector. Lasers are used today as a monochromatic light source. See Raman Spectroscopy for more info. You're right about lasers; the first use of the term, and demonstration of the effect, was in 1959."
(Bill Christensen 3/15/2007 4:45:15 AM)
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