Hello. I would like to ask if really gravitational waves (GWs) exist? Mathematically they are predicted to exist. However despites the intense efforts invested to detect them so far they cannot be detected.
It's not that they "cannot" be; we expect to eventually detect them directly. The problem is that the GWs we could potentially detect here on Earth are so weak that it takes an extremely sensitive detector that has to be isolated extremely well from all other disturbances. That's very hard to do, which is why we aren't quite there yet.Why GW cannot be directly detected?