spectroscope scale

...Spectroscope with Scale pf 400 - 700 nm and Optic Fiber Light FTS-50 Description: The spectroscope is a tool for examining which parts of white light are absorbed by a gemstone. Materials can absorb parts of the electromagnetic spectrum, and when the absorbed parts fall within the visible range, that absorbed part will influence the color of the material. When a gemstone is observed with a spectroscope...

...Microscope Desktop Spectroscope With Optic Fiber Output A24.6341 - A A24.6341-A Desktop Spectroscope Double Adjustable Light Source Adjustable Light Gap Φ2-Φ28nm Adjustable Slit And Draw-Tube Focus With Optic Fiber Output With Wavelength Scale(Range 400...