What is the difference between spectroscopy and spectrometry?

Question

What is the difference between spectroscopy and spectrometry?

Answer 1

The terms are used very often for each other and there is a third term, spectrophotometry.  The way I use them is this.

Spectroscopy is the interation of electromagnetic radiation with a chemical or physical species and can also refer to the energy involved.  It is what is happening.

Spectrometry refers to the technique used and how spectroscopy is measured.  It can also include other techniques such as mass spectrometry where there is energy but no light.

So you can say you are experimenting with ultraviolet spectroscopy using ultraviolet spectrometry.

Spectophotometry is historically just spectrometry where the light is UV,visible, or IR.  However as I indicated, the terms get used for each other many times.