Rumours swell over new kind of gravitational-wave sighting
This might be a naive question, but I&#x27;d like to clear it out.<p>Do gravitational waves travel at the speed of light?<p>I know the theory says nothing can travel faster than light. I also know that photons can be seen as quanta or as waves. So my guess is that gravitational waves travel at most, at the speed of light.<p>But do they? or do they travel slower? faster? Is there a doppler effect for GWs?<p>I ask because I would think ripples in the space-time fabric itself might be a bit different than light waves or other more studied phenomena.<p>Can anyone point me in the right direction?