4 ms·
While this may be that they can oscillate forever, measuring it is an act of removing energy from it.
by kevin_b_er 6y ago
While this may be that they can oscillate forever, measuring it is an act of removing energy from it.
- h0l0cube 6y agoSo could it be said then that it's more efficient? Say, you'd need less energy to measure time with a time crystal than a quartz crystal?
- Confusion 6y agoNot 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.
- kolinko 6y agoYou don’t need to remove energy from an object to measure it. If you shine a flashlight into a dark room, you are measuring the positions of objects inside, and those objects don’t lose their energy.
- arbitrage 6y agoyou are changing the momentum of the things you are mentioning. the considerations here are on a more quantum scale than furniture in a room.