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Topic: Coin Flipping Question ?
Replies: 8   Last Post: Nov 8, 2016 9:36 PM

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Gordon Sande

Posts: 137
Registered: 5/13/10
Re: Coin Flipping Question ?
Posted: Nov 8, 2016 8:47 PM
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On 2016-11-08 20:39:51 +0000, Virgil said:

> In article <nvtajf$6qh$>,
> Gordon Sande <> wrote:

>> On 2016-11-08 18:27:57 +0000, Virgil said:

>>> In article <nvsock$ubi$>, Bob <rgsros@notme.invalid>
>>> wrote:

>>>> Hello,
>>>> Have always been bothered by this.
>>>> Would appreciate it if someone could explain it for me.
>>>> I know that what I am defining as the experiment is not practical in the
>>>> "real world," but let me define the following anyway, as the conditions:
>>>> I have a few thousand "discs"
>>>> They are absolutely identical, down to the atomic level.
>>>> Each side has a thin coating of something; one side red, one side blue.
>>>> The coatings are also identical; same thickness, absorbency, etc.
>>>> So the resultant coins are absolutely identical.
>>>> In every way.
>>>> I now have a mechanical gadget that flips each one, again identically.
>>>> Same velocity, momentum, etc., etc. imparted.
>>>> Absolutely identical flipping motion imparted for each one.
>>>> There are no outside influences, other than gravity.
>>>> No air currents, solar wind or pressure, etc.
>>>> Nothing.
>>>> Will I see the typical 50 % - 50 % split ?
>>>> (For this case by colors,rather than heads/tails)

>>> Not necessarily, as quantum effects in otherwise identical experiments
>>> are known to produce differing results.

>> One expects tat the OP's disks are quite macro so are not going to behave
>> as waves like an electron or other small object where quantum effects
>> dominate.

> But if everything macro is made exactly the same, the results must be
> determined by the micro effects.
> If there is any macro bias to the coin flipper they will likely all go
> the same way, but in the absence of biasing macro effects, the micro
> or quantum effects may determine some results.

Perhaps in the number of small bounces before settling down but not in the
macro end result.

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