A plate of glass or metal ruled with very close parallel lines, producing a spectrum by diffraction and interference of light.
- In our fluorimeter, monochromatic light is produced by passing white light through a diffraction grating.
- In a mechanically tuned laser, the wavelength is adjusted by physically moving a diffraction grating or a reflective mirror, and this method also provides a precise and continuous tuning curve.
- Last was the invention of the diffraction grating for use in analyzing spectra from astronomical bodies.
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