[Barrykgerdes]

I have a nice little spectroscope that was loaned to me on a long term loan some years ago. It was essentially for examining liquids. There was a minature test tube that fits in one of the holes. It has an adjustable slot, prism and viewing eyepiece all built in.

Looking at a white TV screen LCD gives colour lines in the blue, red and green areas of the spectrum. Looking at daylight from the sun gives the standard white light spectrum view showing the absorption lines, principally the sodium line. Looking at one of those energy saving floros shows why you should never use them for serious viewing of coloured objects.

Barry