Optical slit
= Optical slit
= Spectrograph slit
{synonym}
An <optical slit> selects a narrow region of a <focal plane>. In a slit-limited <spectrograph>, the width of its image divided by the <linear spectral dispersion> sets the spectral width.
= Optical slit
= Spectrograph slit
{synonym}
An <optical slit> selects a narrow region of a <focal plane>. In a slit-limited <spectrograph>, the width of its image divided by the <linear spectral dispersion> sets the spectral width.