Spectroscopy or ghost science

Also spectra...

So, separating features of an object is to make a spectrum. This can be the mass of positive ions in strawberries smell, the energy of photons from an annihilating antimatter, faint hints in the energy dependence for muon production or infrared absorption by silicon.

All these, we call spectra.
And all are so beautiful for scientists, as a purple morning sky. Hoping, also for You!