Faster Than Light?

[jinushaun]

Originally posted by V.S.
seconds are not a measure of speed.

True, but v_avg = delta_x/delta_t. If delta_x remains the same and delta_t gets larger, then v_avg gets smaller.

Btw, does any one know how to get delta to show up?

[AEstud]

what does all of that mean?

[_W_]

Originally posted by AEstud
How about this one. The speed of light is slowing down. From what I've read its by one billionth of a second every one or two years.

I suggest you speak more of what you know, and less of what you've heard. The first one stand a small chance of being correct, the second is guaranteed to be lacking of any truth.

[AEstud]

What is your problem, do you have some kind of chip on your shoulder or some type of grudge? Besides that, its not like your opinion matters to anyone excpet the person you are supporting, then again that means thier using you. Don't put too much value on what you know.

[jinushaun]

Originally posted by AEstud
what does all of that mean?

Average velocity is:

    v_avg = delta_x/delta_t = (x2 - x1)/(t2 - t1).

If you've taken calculus, then you know that instantaneous velocity is v = dx/dt--but this isn't important for argument. Also, speed is the numerical value of velocity, is represents how fast you are travling from x1 to x2 in a given time interval (t2 - t1).

So... if delta_t = t2 - t1 and delta_t gets larger, then v_avg will get smaller if delta_x remains the same. This makes sense intuitively because if it takes you longer than before to get from x1 to x2, then that means you must be traveling at a slower speed.

And back to VS's comment. Yes, seconds isn't a measurement of speed. But since you quoted that delta_t changes each year by a certain number, then we know that this will affect the velocity of light.

Now, did that make sense?

[AEstud]

No I haven't taken calculus yet but your explanation does make to me. It's strange how I don't understand algerbra but do understand precal and physics.