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Brennus
09-22-2016, 12:21 PM
I read somewhere that the result of this experiment (https://en.wikipedia.org/wiki/Michelson%E2%80%93Morley_experiment) wasn't null [as is usually reported] but there was small slight positive result.

What do members here think of this experiment:

1) do you think it was indeed a null result?

or

2) there was actually a slight positive result?



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Andro
09-22-2016, 12:47 PM
I read somewhere

Where is this 'somewhere'? Can you link to it?

Lux Natura
09-23-2016, 03:06 PM
In that wikipedia article it clearly states that it wasn't exactly 0, but some other extremely small value which was much smaller than their projected uncertainty (due to inaccuracies in measurement), so it's essentially zero and not usable data.

No measurement system is infinitely accurate, and there is always uncertainty. If the result is less than the uncertainty of the measurement then that result is due to the quality of the measuring equipment, and not valid data for what they are measuring!

You can read in the article that it was more than an order of magnitude smaller than the uncertainty due to equipment. If it was an order of magnitude larger, then that would be usable data.

Brennus
09-26-2016, 08:55 PM
Where is this 'somewhere'? Can you link to it?

Unfortunately no!

Brennus
09-26-2016, 08:57 PM
In that wikipedia article it clearly states that it wasn't exactly 0, but some other extremely small value which was much smaller than their projected uncertainty (due to inaccuracies in measurement), so it's essentially zero and not usable data.

No measurement system is infinitely accurate, and there is always uncertainty. If the result is less than the uncertainty of the measurement then that result is due to the quality of the measuring equipment, and not valid data for what they are measuring!

You can read in the article that it was more than an order of magnitude smaller than the uncertainty due to equipment. If it was an order of magnitude larger, then that would be usable data.

IMHO it is far more likely to exist than dark matter/energy which still remains elusive!