Mercury lamp spectrum
April 24, 2009 – 1:43 pmThe un-done demo of the day is the 4 meter wide spectrum of mercury vapor, visible lines on a screen and the ultraviolet lines detected with a hand held screen.
With three colored plexiglas sheets was demonstrated absorption spectroscopy. The yellow plastic absorbed the violet line and glowed fluorescently yellow. The orange sheet absorbed the green lines, and the red sheets absorbed yellow and green. The yellow lines were clearly doubles.
The lamp is 1000 W and the quartz capsule is bare to the air, making safety a big deal. The slit is formed by the door to the emergency exit, almost closed, across from the exit door on the other side of the hall, where we have the 7 meter focal length mirror grating reflecting back onto a screen. The colors are beautiful, and the UV lines go way over, with the zinc sulfide detector showing them handily.
A balloon, 1,2,3 volume sequence. Apropos the 1812 Overture balloon cannons, which are filled first with one part oxygen, followed by two parts hydrogen.
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