Hi, When a molecule makes a transition from high energy state to low energy state, it emits electromagnetic radiation with a certain wavelength, which can be collected as emission spectrum. However, I have a question right here: For any real case, there are quite a number of molecules in one experiment. They emit photons under certain excitation wavelength, and these emitted photons are detected. However, is it possible that those photons interference with each other? If so, then what is detected does not reflect the real distribution of wavelengths emitted. Is this possible at all?