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What is the resolution of spectra produced by the STAR ANALYSER?

April 26, 2017analyser produced resolution Spectra star

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What is the resolution of spectra produced by the STAR ANALYSER?

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At first sight one might think that by using a grating with more closely spaced lines or mounting it further away, one could increase the resolution as much as one liked. In practise though, there are several other factors which limit the resolution for this type of configuration. The most significant ones are.