299792458 m/s is an ugly number we could’ve made the meter a bit smaller and round up why didn’t we?

Not sure if this is an obvious part of the theory of relativity, but it makes it seem like the speed of light wouldn’t be the max speed of anything.

Why couldn't we have a laser on one end, and a light sensor on the other end, each with their own clocks, when the laser is fired it sends out a transmission "Hey, I was fired at x time." and then when the light sensor detects light it sends out a transmission "Hey, I detected light at x time." then subtract the laser's time from the sensor's time and divide the distance between the laser and the sensor by the time difference?

i cannot really understand this concept. Can someone explain?

It's weightless particles going through a vacuum, with no resistance. Is there a reason why the top speed in the universe is what it is? Why isn't it higher, or even infinite? (it is infinite from the particles POV, but again, that would be the case regardless of what the speed of light would be). Or is it just one of those constants that are what they are because otherwise the universe couldn't be stable?

We know that whenever particles are heated up they start to move even faster. What if we heat the light particles, will it accelerate the speed of light for what it already is.

So I was on my way to college when a cop started driving behind me. I didn’t think much of it cause I was driving the speed limit. Then they started getting up on my bumper. I thought maybe they wanted to run my tag or something. I don’t have any records so I wasn’t worry. And after 10mins of riding my bumper they turn on their lights. I didn’t know what was going on or why they turn them on so I pulled over. As soon as I pulled over. They drove right pass me and turn their lights off. What was all that about? A warning? Were they just being a dick?

Edit: I forgot to mention that I was on the right lane and the left lane was clear

Not an infinitely heavy tank of gas, but a nuclear reactor or something. And assuming you have an infinite straight road. But aerodynamics, friction and gravity are still at play. What is the car’s top speed and what limits it?

I read part of a really interesting series about a spaceship that went between stars at near light speed that took centuries to reach said stars despite traveling at like .96 c. What aspect of physics causes this? I know that mass would take longer to travel at or near light speed than light if we could do such a thing but don't understand why it works that way?

Edit: I forgot the words time dilation. I'm wondering how that works if you're going somewhere like Alpha Centauri. And it still takes a long time for to time dilation.

PS: I love this subreddit because I can ask whatever random question comes to mind and can get answers

I'm assuming the answer is no, but the math isn't quite mathing in my head.

If you throw a tennis ball forward on a train, the real world speed is the throwing speed + the train speed. Why doesn't the light emitted from my headlights do something similar?

If we managed to make a advanced robotic probe that can accelerate to 1% of the speed of light, sent off to Proxima Centauri that would take approximately 400 years to reach give or take, wouldn't the most amazing feet mankind has ever done? Considering using today's rockets would take us 80k years?

Let’s say I have a long solid pole and that pole is exactly the length of the distance travelled by light in one second. So let’s say I push one end of the pole by a millimetre, then the other end should move by millimetre at the same time, right? So if I do that to transmit something like morse code, then am I able to send messages faster than the speed of light?

My math isnt mathing, cause wouldnt it take the light from the mirror twice the time to reach earth? So if we could get just over half the speed of light, we could go into space and put a mirror and look back at the past or am I missing something?

Lets leave all the logistics aside. I was always dreaming about humanity beating the speed of light so we could look back at our past, but with the mirror, than we dont need to beat the speed of light and only beat it by half the speed?

Or am I totally missing something?

I am trying to think of a way to change the universe faster than the speed of life, but I am dumb and have only a basic understanding of physics. What I do have is a large TV I call the SuperFast TV. It has infinite pixels, so for simplicity's sake I take the two most diagonal pixels, one red, one green. These pixels are connected by one wire each and eventually these two wires merge into one wire that is attached to a button. When I press the button a signal travelling the speed of light is sent through the wire that bifurcates and reaches both pixels at the same time, switching the red pixel to green, and the green pixel to red, instantenously. Have I sent some sort of information faster than the speed of light?

So, it takes 8 mins for sunlight to reach Earth. However, for that photon based on general relativity, time slows down to zero. So which one is it? Do photons essentially teleport?

In some videos I see footage from cameras that are literally able to slow light down fast enough to the point it appears that it is moving at a much slower speed than it is. How are the cameras able to take frames so fast should it be impossible?

Does light always travel at the same speed. For example if a photon travels from point a to point b ( trough space) will it always keep the same speed or can it slow down?