Size of the Diffraction grating ?

[Spiral1977]

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.

 

[Tiroth]

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