I got a spectroscope because I'm interested in the properties of light, like: what's the difference between a yellow flower, and a picture of that flower on your computer? Why are the primary colours of light and paint different?
With a spectroscope, you can see the differences in "white" light. Sunlight is a continuous spectrum, and artificial lighting attempts to mimic that by mixing at least 5 colours. Electrical displays use RGB, but they're wider than I expected. It would be interesting to compare LED lit and CCFL lit LCD screens.
Previously, I had tried making my own spectroscope using a CD and cardboard tube:
Sunlight
Fluorescent light
LED screen
I would like to improve my spectroscope by making the slit width adjustable, maybe by using sharp metal edges and a screw mechanism.
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