Please help me , i have gem-a refractometer with built-in monochromatic filter , kindly inform with this i can use normal white light torch or i need to use a sodium filter or sodium light source ?
Joined: Sun Oct 16, 2005 12:22 pm Posts: 21602 Location: San Francisco
I own this refractometer. As 1bwana1 pointed out, it comes with a built in sodium filter. You can back it up to your polariscope if you have one with a front light source.
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