An absorption spectrum is obtained by: a.) the same method used to measure transmission. b.) collecting the scattered light intensity at an orthogonal angle to the sample. c.) holding the excitation wavelength constant while scanning for the emission wavelength. d.) holding the emission wavelength constant while scanning for the excitation wavelength. e.) collecting the transmitted light at an orthogonal angle to the sample

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Wien's displacement law

Students often get confused between Wien's displacement law and Planck's radiation law. Although both are historically related, yet they are conceptually different. Planck's law helps determine the spectrum of a blackbody, while Wien's law determines the relationship between peak wavelength and temperature.