50. The diffraction grating is illuminated by a parallel beam of white light. The difference between the angles of deflection of the end of the first and beginning of the second spectra (Δφ = 0°12 ') wavelengths of extreme rays may be taken as λK = 0,76 m and λF = 0.38 microns. Determine the lattice period d.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)