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(Grating Prism)
(combination of a grating and a prism)

A Grism (or Grating Prism) is a combination of a Grating and a Prism, arranged so Electromagnetic Radiation at a certain Wavelength passes through, allowing a single instrument to act both as an imager and a Spectroscope. Examples:


Referenced by:
Faint Infrared Grism Survey (FIGS)