Hi All. just started to build spectroscope again, I tried a white light from an RGB LED with out slit, on to gratin to get a spectrum so I can have a go in RSpec is this OK.
I don't think the calibration is correct.
By convention the blue end of the spectrum is usually on the left hand side of the image.
The blue end should be from about 4000 A and the red end around 6500.