Concave grating

A concave grating is a specialized mirror with a curved surface etched with many tiny lines called grooves. When light hits the grating, these grooves split and direct the light into specific directions based on its wavelength, separating different colors or energies. The curved shape helps focus and direct the light more precisely, making it useful in spectrometers and optical instruments to analyze light's composition. Essentially, it acts like a sophisticated prism but uses a specially patterned surface to disperse and focus light efficiently.