Not necessarily. You can measure things in ways that add energy: e.g. radar waves contribute a tiny bit of energy to the things they bounce off. Yet they measur

Not necessarily. You can measure things in ways that add energy: e.g. radar waves contribute a tiny bit of energy to the things they bounce off. Yet they measure where objects are. You can also measure some things in ways that add exactly 0 energy. If some quantum system absorbs exactly nothing of a certain wavelength, that tells you something about the system.