according special theory of relativity two persons measure time differently what type of clock do they use?

Question

if a coach and a runner start their clocks at the same time i can under stand that they measure time differently , one thing i want to know is what type of clock they will use

Answer 1

It does not matter the type of clock used.
A clock simply measures the passage of time experienced in its own reference frame, the type of clock is unimportant.

Of course, in the example you gave, it would need to be one really precise clock or a very fast runner in order to be able to notice a difference in the pasage of time between the two reference frames.

Answer 2

It won't matter. According to Albert, all processes will slow down - mechanical, biological, right down to the molecular level. The clock (any type of clock) will run slower (or faster, depending on your reference.) The difference in time between the coach and a runner would be so small it is, for all practical purposes, identical - the runner is no match for the speeds needed to create varifiable results in the time differences.

Answer 3

The clocks have to be very *precise,* not so much accurate, to see the difference for such low speeds. Precision means they have a lot of digits (like it can measure 1 +/- 0.000000000000000001 seconds instead of 1 +/- 0.01 seconds). Accuracy means that they measure a second correctly. In other words, a second measured is a true second. But if both clocks are precise but have the same inaccuracy (like they both think 1 second is 1.00000000007 seconds, then you can measure the relativity-induced *difference. *

Regarding time, yes "time" changes according to AE but really we mean different things when we say "time." In a math sense, we're meaning a modification to the arbitrary units of time. In a normal-person sense, "time" is steady and never changes its pace!

Answer 4

It doesn't matter. In relative motion, it is time itself that changes, not the way the clocks operate. No matter what type of clock you use, two people moving relative to each other will not agree on the rate at which time passes (although you may need a very accurate clock to tell, depending on your relative velocity).

Answer 5

Any clock whatsoever. The reason is that the principle of relativity states that no physical law can differ for two observers in uniform relative motion. So any pair of synchronized clocks will do. Otherwise one or the other would notice his clock functioning differently, and this would make their reference frames inequivalent.

Answer 6

It's not supposed to matter just one accurate enough to measure the difference as someone running is going to cause a very small change in the reading.

Answer 7

according to the definition of inertial and non-inertial frames two observers in 2 different frames find the same event at different times as one is fixed and the other is moving with a const velocity wrt the fixed frame

Answer 8

An extremely accurate one if they are going to actually measure a difference so slight.

Answer 9

What about a biological clock?

Answer 10

Ummm, it must be an atomic clock, eh?