Recent content by ndvcx

thx for formula, could you also paste the terms, definitions ? Also the last term is not clear to me,i.e. the 1.05 mA (!). I'm not in physics, would appreciate discussion of hardware level, if any. I read the wikipedia articles, they did not really center on measurement and instrument sensitivity.

Single electron counters appear to exist, the Jap. have one that even determines direction, and they discuss atto-amperage. What I don't quite get is, if a single electron flows, is there an observed very small current ? Since an electron is the smallest size, more sensitive equipment then can...

Thx Cthugha. I've found some detailed experimental setups which describe how the slits are made microscopically tiny, and the attenuation greater and greater "until the (connected) oscilloscope reports only single electrons being dislodged.." or such. I've watched the hitachi video also. Your...

Thx, can't find the page any more, it discussed the details of PMT. Also, there seems to be an admission that they have "background". Will try to post if I find it.

On the web are some informed-sounding discussions saying that the various videos showing the appearance of the dots on the photo-sensitive surfaces can by no means guarantee that only one photon got through. A lot hinges on that, thanks for referring me to other posts which show certainty of a...

Thx Cragar, but if you place the interfering flashlights densely enough, would there be a way to guarantee collisions such that you woud see less light by peering into the tunnel (where you can only see the one horizontal one aimed at you) ?

A 500 meter dark tunnel with 1000's of strong flashlights mounted on all sides pointing toward the center, not length, of the tunnel. At one end of the tunnel is a single flashlight, horizontally mounted, at the other is a 2 meter "dark" section w.o. flashlights, and a narrowed opening so the...

Your wide spaceship has inside a light and a receiver, widely separated, sideways to direction of travel. As pilot, you notice the blinking light always takes the same time to hit the receiver, whether you are approaching speed of light or not. But an outside observer notices that the path the...