# Gravity at light speed

my question in regards to light. Since gravity warps space time, and we have discovered gravitational waves. Would the light at the front of the wave, be traveling faster than lightspeed? Essentially like a surf board on a wave?

Also, does gravity behave differently at light-speed? Would faster than light-speeds nullify gravity?

• The key question is: how are you measuring the speed of light? Remember that warping spacetime would also warp your ruler and stopwatch as well. Commented May 4, 2020 at 23:11
• @probably_someone But according to your ruler and stopwatch, they would measure $c$ to be the same. They would only appear warped compared to some other reference frame. Also, under what intuition would light be travelling faster at the front of the grav wave? And doesn't a surfboard ride the crest of the wave? Rather than being 'in-front' of it? Commented May 5, 2020 at 0:57
• @SamuraiMelon "They would only appear warped compared to some other reference frame" - That's the point. "Also, under what intuition would light be travelling faster at the front of the grav wave?" I never made that claim. "And doesn't a surfboard ride the crest of the wave? Rather than being 'in-front' of it?" Why would the dynamics of a surfboard be at all relevant here? Do you have evidence that gravitational waves behave in any way similar to water waves? If not, this is not a particularly apt analogy. Commented May 5, 2020 at 1:31
• @probably_someone, Sorry my comment was probably rather misleading, only the 1st thing was addressed to you. In regards to both our points stating the same thing, regardless of reference frame, all the grav waves would travel at $c$. Knowing that Curtis would be notified, the rest of the comments were addressed to him, quoting things directly from his question. Commented May 5, 2020 at 12:51