Obama the Hypnotist...
I don't recall an election campaign in which negative campaigning has played such vital part. It's always there but this time more than ever. And it comes from both sides but the Republicans have really surpassed themselves this time. Perhaps they felt that somehow there was more at stake this time or that it would be easy to tar the relative outsider Barack Obama. And so we've had Barack Hussein the Mooooslim/Aa-rab, Barack Obabykiller, Barack the not-naturally-born-US-citizen, Barack the Terrorist and Barack the Socialist. And rumours about Obama's secret hypnosis techniques have been running rife the last few weeks. But now, in a decidedly last ditch swing, someone has been working hard to flesh out the "theory" of Barack the Hypnotist.
In this astonishingly long and detailed *.pdf, published by anonymous, the unknown author(s?) make the highly risible case for Obama's "Ecksonian" powers of hypnosis.
Despite the veneer of pseudo-science the document is essentially identical to any long-winded Internet sales letter for one of these many pseudo-products that no one wants.
But let's look on the bright side: if it's all true then Obama's awesome powers will come in handy when he sits down without preconditions with the Iranians (and with hypnotic powers who needs preconditions?) I can just see him now, telling Ahmadinejad to look into his eyes and promise to hand over every single enrichment centrifuge, PDQ... or else he'll mass-convert the Iranian clergy to Christianity...
To the right is one of my homemade spectroscopes, constructed from an empty box of cookies, a piece of diffraction grating cut from a CD (or DVD-R) and an adjustable slit made from two safety razor blades. The slit provides a narrow beam of light, more or less collimated, which impinges on the piece of CD glued into place at the end of the box. The angle of incidence
Here, in close up, the end of the box with the CD in place and the peep hole. By holding the slit-end of the box more or less close to any light source and looking through the peep hole, the linearly scaled spectrum of the light source can be observed. In fact usually at least two spectra can be seen:
Here's the 1st order spectrum of a saver light bulb (NOT a traditional incandescent filament bulb), using a DVD-R as reflecting diffraction grating (D = 0.74 μm), photographed using the above design.
To the right the same spectrum photographed in near-identical conditions but using a piece of CD as diffraction grating (D = 1.6 μm). As predicted by theory, the spectrum is less wide (or less 'resolved') and clearly using the DVD-R as a grating is much to be preferred due to higher resolution.



Most of the 'missing' metal (100 % minus the yield) is in fact present in the slag as fine, even invisibly small droplets, stuck in some of the early formed slag that froze when it hit the cold crucible walls, this metal had no opportunity to settle out from the slag. 






