// multi-utility computation suite · offline · instant · precise
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sci.diffraction-grating Calculator
Calculates the diffraction angles and resolving power of a diffraction grating using d sin θ = mλ for m-th order maxima. A grating with 1,200 lines/mm has d = 833 nm — at 500 nm in first order, the primary maximum appears at 36.9°, and the resolving power R = mN separates wavelengths differing by λ/mN.
Inputs
Grating Lines Per Mm
Reference formula or conversion factor shown for context.
Wavelength Nm
Distance between successive wave crests. Related to frequency: λ = speed / frequency.
Order
Reference formula or conversion factor shown for context.
Incident Angle Deg
Reference formula or conversion factor shown for context.
Results
diffraction angle (°)
The computed angle in degrees or radians.
grating spacing d (nm)
A standardised quality or risk rating on the applicable scale.
order m
Reference formula or conversion factor shown for context.
d(sin i + sin out) = mλ
Sample size or count used in the calculation.
angular dispersion (°/nm)
ISP (specific impulse) — rocket engine efficiency in seconds. Higher ISP means more thrust per kilogram of propellant consumed.