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Re: Eight things you might not know about light

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On 4/20/2016 9:01 PM, benj wrote:
> On 04/20/2016 01:41 PM, Odd Bodkin wrote:
>> On 4/20/2016 12:26 PM, benj wrote:
>>> On 04/20/2016 09:12 AM, Odd Bodkin wrote:
>>>> On 4/19/2016 11:08 PM, benj wrote:
>>>>>
>>>>> You think HVAC or Wormley or Odd have the slightest clue what a
>>>>> photomultiplier is, let alone how to wire one up?

>>>> I know what a PMT is, and I've wired one up before.
>>>
>>> Oh wait. You are an amateur scientist, so that makes the difference!
>>
>> PMTs are pretty commonplace.
>
> I used to use one to pickup sound on my old 35mm movie projector!
>
> Remember film? Probably before your time.
>
>>> Ever see any "photons"?
>>>
>>
>> Sure seen signals from PMTs.
>> Also have seen clicks from Geiger counters. Gamma rays, you know.
>
> We can go with Geiger clicks as individual photons, but how do you know
> PMT signaks are not "waves"?  Not common to see individual photon with
> PMTs.
>
>

you can, there are photon counting PMTs by Hamamatsu.
and with most PMTS you can see the pulses on the scope.  At dark you 
have a few pulses, all have the same shape due to responce of the tube 
and circuit, as you add more photons, you get more pulses, and as you 
increase photons they add/merge together and the baseline drifts up, and 
if you add more light you can saturate the tube, signal goes to max and 
you fry tube because the current got too high.  Every tube is guarenteed 
that you can fry it once.

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Eight things you might not know about light Sam Wormley <swormley1@gmail.com> - 2016-04-19 11:21 -0500
  Re: Eight things you might not know about light Helmut Wabnig <hwabnig@.- --- -.dotat> - 2016-04-19 18:31 +0200
    Re: Eight things you might not know about light Sam Wormley <swormley1@gmail.com> - 2016-04-19 11:33 -0500
    Re: Eight things you might not know about light Poutnik <poutnik4nntp@gmail.com> - 2016-04-19 18:42 +0200
    Re: Eight things you might not know about light Sergio <invalid@invalid.com> - 2016-04-19 18:06 -0500
      Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-20 00:08 -0400
        Re: Eight things you might not know about light HVAC <mr.hvac@gmail.com> - 2016-04-20 04:25 -0700
          Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-20 13:23 -0400
        Re: Eight things you might not know about light Odd Bodkin <bodkinodd@gmail.com> - 2016-04-20 08:12 -0500
          Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-20 13:26 -0400
            Re: Eight things you might not know about light Odd Bodkin <bodkinodd@gmail.com> - 2016-04-20 12:41 -0500
              Re: Eight things you might not know about light Sergio <invalid@invalid.com> - 2016-04-20 12:53 -0500
              Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-20 22:01 -0400
                Re: Eight things you might not know about light Odd Bodkin <bodkinodd@gmail.com> - 2016-04-21 08:51 -0500
                Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-21 12:07 -0400
                Re: Eight things you might not know about light Odd Bodkin <bodkinodd@gmail.com> - 2016-04-21 11:34 -0500
                Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-21 22:07 -0400
                Re: Eight things you might not know about light Odd Bodkin <bodkinodd@gmail.com> - 2016-04-22 07:42 -0500
                Re: Eight things you might not know about light Sergio <invalid@invalid.com> - 2016-04-21 11:33 -0500
                Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-21 21:45 -0400
    Re: Eight things you might not know about light "Y.Porat" <y.y.porat@gmail.com> - 2016-04-20 01:43 -0700
  Re: Eight things you might not know about light "reber g=emc^2" <herbertglazier0@gmail.com> - 2016-04-19 12:24 -0700
    Re: Eight things you might not know about light "reber g=emc^2" <herbertglazier0@gmail.com> - 2016-04-19 15:32 -0700
    Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-19 23:31 -0400
  Re: Eight things you might not know about light "nuny@bid.nes" <Alien8752@gmail.com> - 2016-04-19 17:08 -0700
    Re: Eight things you might not know about light Sam Wormley <swormley1@gmail.com> - 2016-04-19 19:23 -0500
    Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-20 00:09 -0400
      Re: Eight things you might not know about light "nuny@bid.nes" <Alien8752@gmail.com> - 2016-04-19 23:15 -0700
  Re: Eight things you might not know about light Sylvia Else <sylvia@not.at.this.address> - 2016-04-20 12:07 +1000
    Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-20 00:14 -0400
      Re: Eight things you might not know about light "Y.Porat" <y.y.porat@gmail.com> - 2016-04-20 06:38 -0700
    Re: Eight things you might not know about light Sam Wormley <swormley1@gmail.com> - 2016-04-20 11:09 -0500
      Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-20 13:46 -0400
        Re: Eight things you might not know about light Poutnik <poutnik4nntp@gmail.com> - 2016-04-20 20:07 +0200
        Re: Eight things you might not know about light Sylvia Else <sylvia@not.at.this.address> - 2016-04-22 11:50 +1000
          Re: Eight things you might not know about light benj <nobodyxx@gmail> - 2016-04-21 23:19 -0400
  Re: Eight things you might not know about light "reber g=emc^2" <herbertglazier0@gmail.com> - 2016-04-21 09:19 -0700
    Re: Eight things you might not know about light Sam Wormley <swormley1@gmail.com> - 2016-04-21 15:46 -0500

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