B Understanding Centre of Mass in Stationary Objects

[Ibix]

we can't go any further as I think it would appear at C.

If your eye was facing D the light from C would come in the corner of your eye, not straight on, the light would strike your eye at an angle

No, because (in the frame you insist on working in) your eye is moving sideways as the light enters. That's what my diagram shows. The pipe is a really long eye, and the laser pulse travels right down the centre of it the whole way.

Feel free to try it. Stand beside a road bouncing a basketball straight up and down. According to the driver of a passing car you're doing 30mph and the ball appears to be moving diagonally. Does it make any difference to you? According to you, you'd have to adjust the angle you're bouncing the ball just because the driver was watching you.

 

[Ross B]

No, because (in the frame you insist on working in) your eye is moving sideways as the light enters. That's what my diagram shows. The pipe is a really long eye, and the laser pulse travels right down the centre of it the whole way.

Feel free to try it. Stand beside a road bouncing a basketball straight up and down. According to the driver of a passing car you're doing 30mph and the ball appears to be moving diagonally. Does it make any difference to you? According to you, you'd have to adjust the angle you're bouncing the ball just because the driver was watching you.

that is not the same scenario tho as the driver is not at rest wrt to the ball and the bouncer. In my scenario the observer, laser, earth, sun and frame are all at rest wrt one another

the angle the light enters yr eye is NOT a function of W, but is a function of the width of the frame.

As the light is entering the left of yr eye, your eye moving to the right actually makes the angle of entry more rakeish

surely if light bounced off an object at C, the object would have to appears at C

empty the spaceship, fix an object at c, speed the spaceship up to W, bounce a light off the object at C, will it appear at C?

 

[Ibix]

that is not the same scenario tho as the driver is not at rest wrt to the ball and the bouncer. In my scenario the observer, earth, sun and frame are all at rest wrt one another

Then why are you drawing them in a moving frame?

 

[Ross B]

Then why are you drawing them in a moving frame?

empty the spaceship, fix an object at c wrt my eye, speed the spaceship up to W, put a strobe at C, bounce a light off the object at C, will I perceive it to be at C?

 

[Ibix]

What have I said the last five times you've asked this question?

I think I'm going to duck out of this thread now. I've told you the answer; I've drawn a diagram demonstrating the answer; and I've suggested an experiment you can do to test the answer. I don't think there's anything more I can offer.

 

[Ross B]

What have I said the last five times you've asked this question?

I think I'm going to duck out of this thread now. I've told you the answer; I've drawn a diagram demonstrating the answer; and I've suggested an experiment you can do to test the answer. I don't think there's anything more I can offer.

I agree ...I don't agree with you...I also proposed an experiment so you can test yr answer

 

[Ross B]

What have I said the last five times you've asked this question?

I think I'm going to duck out of this thread now. I've told you the answer; I've drawn a diagram demonstrating the answer; and I've suggested an experiment you can do to test the answer. I don't think there's anything more I can offer.

a further problem u have is the tubes would not appear straight, they would appear bent

 

[fresh_42]

This thread is going nowhere.

a) It's a re-opening of a closed thread which was already an exception we've made.
b) The answer has been given several times.
c) All participants who actually know the answer and tried to explain it, gave up.

As virtual means on the internet are restricted, the only remaining advice is to read a book about special relativity. Here's the first entry I received from google.com

https://web.stanford.edu/~oas/SI/SRGR/notes/srHarris.pdf

which starts right away by explaining frames aka coordinate systems. However, there are many. many more, such that one of them should be appropriate.

Sorry, that we couldn't solve this one to the satisfaction of the OP, but these cases occur.

Thread closed.