41. The individual frequency components of the transmitted light are spatially separated using a simple spectrometer, usually a diffraction grating . 42. The two prism K-alpha spectroheliographs were acquired in 1904 and the H-alpha diffraction grating spectroheliograph was operational in 1911. 43. The periodic structure of a crystalline solid acts as a diffraction grating , scattering the electrons in a predictable manner. 44. These structures, called diffraction gratings , are microscopic patches of grooves, spaced so that they diffract light to give particular colors. 45. Proper calibration and movement of the diffraction grating using the wavelength control enabled the user to scan for various wavelengths. 46. Light of a different frequency may also reflect off of the same diffraction grating , but with a different final point. 47. ASPs are typically composed of two gratings ( a diffraction grating and an analyzer grating ) above a single photodiode. 48. The other design by Sony uses a diffraction grating to part the laser light into one main beam and two sub-beams. 49. The diffraction grating formed in this way is analogous to a conventional diffraction grating with lines ruled on a glass plate. 50. The diffraction grating formed in this way is analogous to a conventional diffraction grating with lines ruled on a glass plate.
