D
David L. Jones
Guest
Michael A. Terrell wrote:
Dave.
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Whoosh!rickman wrote:
On Jun 1, 10:33 pm, ItsASecretDummy
secretasian...@thebarattheendoftheuniverse.org> wrote:
On Mon, 01 Jun 2009 17:40:20 -0700, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
Single-electron transistors can sense, well, single electrons.
John
PMTs can be good enough to detect single photon events.
Hmmm... I have a $35 digital multimeter that can measure exactly 0
volts!
No, it can't. It can display zero, even with some voltage at the
input. The issues is the resolution of the meter. Even with the
probes shorted, you will have some Johnson noise which is generated
by the resistors in the input circuitry, if the meter is above
absolute zero degrees. That voltage is too low to be displayed, but
it is still there.
Dave.
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