"Analytical infrated spectroscopy Cecil L. Wilson, G. Svehla. grating. While only
about 10 per cent of the light was reflected by early types of gratings (Fig. 48(a))
for a spectrum of a given order, so-called echelette optical gratings (Fig. 48(b))
reflect about 80 per cent of the light. The resolving power of a grating {A) can be
im- Material of the prism Wavelength Hygroscopicity region (/um) (solubility in
100 g of water) Normal ..."