There is a new NTI link where Cassandra says:
Quack, Quack!
13 years ago
Wednesday, September 21, 2011
Monday, September 5, 2011
Machinist School - Home Made Helium Light
Helium light sources emit monochromatic light, a light with only one color .... if you use a prism, you won't see a rainbow of colors. The monochromatic light is needed to determine flatness.
But you also need an optical flat. Rather that read all about optical flats here, just Google optical flats and read about them there.........
This is simply to relay a cute article about how to make a home made helium light bulb.
The Machinist School is a fan of home made stuff.
Click the link!
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