- #141
A. Neumaier
Science Advisor
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The charges are only moved a little, not concentrated to a point from everywhere:meopemuk said:According to you, before the measurement the electron had the form of a charge density cloud extending over the range of several centimeters. After the measurement we see that one CCD pixel has its charge changed by -e, while all other pixels stay with the same (=0) charge. This looks like "sucked into a point" to me. How this behavior can be achieved by a "moving charge distribution, radially expanding in its rest frame"?
(taken from http://en.wikipedia.org/wiki/Charge-coupled_device )A charge-coupled device (CCD) is a device for the movement of electrical charge, usually from within the device to an area where the charge can be manipulated, for example conversion into a digital value. This is achieved by "shifting" the signals between stages within the device one at a time. CCDs move charge between capacitive bins in the device, with the shift allowing for the transfer of charge between bins.
Often the device is integrated with an image sensor, such as a photoelectric device to produce the charge that is being read