41. Measuring all the wavelengths that a substance absorbs enables a researcher to determine the absorption spectrum of the substance. 42. Through a hand-held ( direct vision ) spectroscope, doped synthetics will exhibit a rich absorption spectrum typical of doped stones. 43. The scattering and reflection spectra of a material are influenced by both its index of refraction and its absorption spectrum . 44. In FRET, two dye molecules are chosen such that the emission spectrum of one overlaps the absorption spectrum of the other. 45. Repeated readings of a sample were taken to produce photographic plates showing the absorption spectrum of a material at different wavelengths. 46. In 1931, he collaborated with David Keilin and Robin Hill to determine the first absorption spectrum of a cytochrome, cytochrome c. 47. The " probe " field is tuned near resonance between two of the states and measures the absorption spectrum of the transition. 48. The rate of photon absorption depends upon the absorption spectrum of the sensitized TiO 2 layer and upon the solar flux spectrum. 49. Each of the exciton resonances can produce a peak to the absorption spectrum when the photon energy matches with E _ \ lambda. 50. The cationic ( unbound ) form is green / red and has an absorption spectrum maximum historically held to be at 465 nm.
