Speed of light and speed of sound both constant

[Nugatory]

So have there been any other experiments which actually have a moving observer to the light source, because if not, I don't think it has been conclusively proven that the speed of light is constant.

There Is a sticky thread at the top of this forum on experimental support for relativity: https://www.physicsforums.com/threads/faq-experimental-basis-of-special-relativity.229034/

You want the section on tests of light speed from a moving source.

 

[Mister T]

This discussion has evolved but it is still in essence comparing light and sound waves.

In the scenario you described, the sound from a fog horn is emitted from a ship that is moving towards an observer on shore. The speed of the sound waves is indeed unaffected by the motion of the ship, but I asked you what speed you'd measure for that sound wave if you were moving from the ship towards the observer.

You didn't answer, but it's clear from what you've already said that you know you'd measure a speed less than the speed measured by the observer on shore.

Now, to answer the question you asked when you started this thread, imagine the same scenario, but this time with a beam of light instead of a sound wave. Both you and the observer on shore would measure the same value for the speed of that light beam. That is the reason that Einstein's theory of relativity differs significantly from the theory of relativity that preceded it.

 

[freshnfree]

1. The fact that you don't understand something does not mean nobody does, or that it is wrong.
2. PF is not the place for challenges to conventional physics. That's what the journals are for.
3. If you want to convince people that conventional physics is incorrect, making mistakes when discussing it is not the way to do it.

I would have a thought a forum was a very good place to make a challenge. Making mistakes is part of learning. It is not a problem to make a mistake, the problem is when the mistake is never corrected because it has been around forever and is therefore thought not to be a mistake. It was 6 years ago that my mind no longer accepted that time dilation was possible. It took my mind six years to even think about challenging that the speed of light was not constant because that's how powerful the idea was in our society. Yes, I have challenged something which was thought to be set in stone and my hands were shaking as I challenged it. It appears that my challenge is not accepted by the people on this forum. So be it.

 

[Drakkith]

I would have a thought a forum was a very good place to make a challenge.

Not this forum. Per PF Terms and Rules:

Mission Statement:

Our mission is to provide a place for people (whether students, professional scientists, or others interested in science) to learn and discuss science as it is currently generally understood and practiced by the professional scientific community. As our name suggests, our main focus is on physics, but we also have forums for most other academic areas including engineering, chemistry, biology, social sciences, etc.

If you are not here to learn about mainstream science, then you have come to the wrong forum. If you wish to challenge a theory used by mainstream science, then do so in scientific journals where such discussion belongs.

It was 6 years ago that my mind no longer accepted that time dilation was possible.

This is nonsense. Time dilation is not only possible, it is observed every single day in experiments around the world. Various technologies like the GPS system and particle accelerators have to be designed specifically to account for time dilation. To say that time dilation is extremely well supported by evidence would be a gross understatement. Modern physics, which predicts the behavior of nature to an absurd degree of accuracy, would literally not make sense without it.

Since you've admitted that your purpose here is not to learn, but to challenge, I am locking this thread.