Diffraction Grating Calculator

Calculate the diffraction angle using: $$ \theta = \sin^{-1}\!\Bigl(\frac{m\, \lambda}{d}\Bigr) $$

* Use consistent units for wavelength (λ) and grating spacing (d). For example, both in nanometers.

Step 1: Enter Parameters

Diffraction Order, $m$:

e.g., 1 (first order)

Wavelength, $\lambda$ (nm):

e.g., 500 nm

Grating Spacing, $d$ (nm):

e.g., 1000 nm

Calculated Diffraction Angle