What physical quantity will all observers always find the same value for?

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What physical quantity will all observers always find the same value for?

2006-06-13 09:29:10 · 5 answers · asked by russ23 1 in Science & Mathematics ➔ Physics

5 answers

The speed of light is always constant in any reference frame.

No matter the reference frame, an observer will always measure the speed of light in a vacuum to be exactly,
299,792,458 m/s.

2006-06-13 09:32:44 · answer #1 · answered by mrjeffy321 7 · 1⤊ 0⤋

Assuming all instruments are correct, I would guess mass because that never changes.

2006-06-13 09:32:33 · answer #2 · answered by cosmo5847060 3 · 0⤊ 0⤋

the null set

2006-06-13 09:33:00 · answer #3 · answered by mykidsRmylife 4 · 0⤊ 0⤋

H bar!!

2006-06-13 09:33:50 · answer #4 · answered by andy pandy 1 · 0⤊ 0⤋

2006-06-13 10:14:41 · answer #5 · answered by dad2_3girls 1 · 0⤊ 0⤋