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  2. Electroscope - Wikipedia

    en.wikipedia.org/wiki/Electroscope

    The pith ball can be charged by touching it to a charged object, so some of the charges on the surface of the charged object move to the surface of the ball. Then the ball can be used to distinguish the polarity of charge on other objects because it will be repelled by objects charged with the same polarity or sign it has, but attracted to ...

  3. Faraday's ice pail experiment - Wikipedia

    en.wikipedia.org/wiki/Faraday's_ice_pail_experiment

    The result (proved below) is that the total charge induced on the inside of the container is equal to the charge on C. In Procedure 5, when C is touched to the container's inner wall, all the charge on C flows out and neutralizes the induced charge, leaving both the inner wall and C uncharged. The container is left with the charge on its outside.

  4. The separation of charges is microscopic, but since there are so many atoms in the pith ball the total force is strong enough to pull the pith ball toward the external charge. Date 2 October 2012, 20:05:16

  5. Electrometer - Wikipedia

    en.wikipedia.org/wiki/Electrometer

    The number of degrees twisted to bring the balls back together is in exact proportion of the amount of charge of the ball of the carrier rod. Francis Ronalds , the inaugural Director of the Kew Observatory , made important improvements to the Coulomb torsion balance around 1844 and the modified instrument was sold by London instrument-makers. [ 6 ]

  6. Wikipedia : Requested articles/Natural sciences/Physics

    en.wikipedia.org/wiki/Wikipedia:Requested...

    Many Interacting Worlds a new theory involving many worlds where the worlds interact with each other. calculations using this model were shown to be able to replace the wave function. by simulating as few as 41 worlds they were able to retrodict the results of the double-slit experiment, for example. there are some possibilities for actually ...

  7. History of electromagnetic theory - Wikipedia

    en.wikipedia.org/wiki/History_of_electromagnetic...

    To this end, suggestions as to the employment of electricity in the transmission of intelligence were made. The first of the methods devised for this purpose was probably that of Georges Lesage in 1774. [61] [62] [63] This method consisted of 24 wires, insulated from one another and each having had a pith ball connected to its distant end. Each ...

  8. Electrostatic induction - Wikipedia

    en.wikipedia.org/wiki/Electrostatic_induction

    [4]: p.711–713 If, while it is close to the positive charge, the above object is momentarily connected through a conductive path to electrical ground, which is a large reservoir of both positive and negative charges, some of the negative charges in the ground will flow into the object, under the attraction of the nearby positive charge. When ...

  9. Detectors for transmission electron microscopy - Wikipedia

    en.wikipedia.org/wiki/Detectors_for_transmission...

    Charge coupled device (CCD) cameras were first applied to transmission electron microscopy in the 1980s and later became widespread. [3] [4] For use in a TEM, CCDs are typically coupled with a scintillator such as single crystal Yttrium aluminium garnet (YAG) in which electrons from the electron beam are converted to photons, which are then transferred to the sensor of the CCD via a fiber ...