Calculates diffraction grating resolving power R = λ/Δλ = nN (order × grooves), spectral order, and angular dispersion. A grating with 1,200 grooves/mm and 50 mm width has R = 60,000 in first order — sufficient to resolve sodium D-line doublet separation of 0.6 nm at 589 nm.
Inputs
N Lines
Count of items or occurrences.
M Order
Reference formula or conversion factor shown for context.
Lambda Nm
Distance between successive wave crests. Related to frequency: λ = speed / frequency.
Results
resolving power R = mN
Sample size or count used in the calculation.
minimum resolvable Δλ (nm)
The smallest value in the dataset or feasible range.
free spectral range FSR (nm)
The difference between the maximum and minimum values.
R = mN
Sample size or count used in the calculation.
spectroscopy application
Recommended use case or application for this configuration or result.
grating equation reference
A standardised quality or risk rating on the applicable scale.