Question

Difference between absorption and excitation spectra

Answer 1

Answer:

The excitation spectrum and absorption spectrum of a molecule probe the excited states, whereas an emission spectrum probes the ground state. In principle, absorption and excitation spectra will provide the same information. ... The fundamental difference between the two spectra is how that intensity is measured.

Answer 2

Answer:

While an excitation spectrum shows the wavelengths of light that a sample will absorb to be able to emit at a specified wavelength, an absorption spectrum shows all of the wavelengths at which light is absorbed by the sample.