What I want to do or know
I just built up my spectrograph and plugged it into the computer. Problem is, I don't see a real spectrum but only three more or less blue lines. What am I doing wrong? I pointed the device towards diffuse sun light, a candle, a light bulb, and all I am getting are a few blue stripes no yellows, greens or whatever...
Hi! Can you post what you see in an image, or a link to a spectrum?
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