Size of the Diffraction grating ?

Spiral1977
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Size of the "Diffraction grating"?

Is the size of the "Diffraction grating" related to the sharpness/brightness of the lines of spectrum which are produced by it?

Thanks.
 
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Sharpness, yes. If there are more slits, the lines will be sharper. The brightness wouldn't change, I don't think.
 
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