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  2. Electroscope - Wikipedia

    en.wikipedia.org/wiki/Electroscope

    The first electroscope was a pivoted needle (called the versorium), invented by British physician William Gilbert around 1600. [1] [2] The pith-ball electroscope and the gold-leaf electroscope are two classical types of electroscope [2] that are still used in physics education to demonstrate the principles of electrostatics.

  3. Electrometer - Wikipedia

    en.wikipedia.org/wiki/Electrometer

    The gold-leaf electroscope was one of the instruments used to indicate electric charge. [1] It is still used for science demonstrations but has been superseded in most applications by electronic measuring instruments. The instrument consists of two thin leaves of gold foil suspended from an electrode.

  4. File:Gold leaf electroscope diagram.svg - Wikipedia

    en.wikipedia.org/wiki/File:Gold_leaf...

    The original can be viewed here: Gold leaf electroscope diagram.jpg: . Modifications made by Krzysztof ZajÄ…czkowski (malyszkz) . I, the copyright holder of this work, hereby publish it under the following license:

  5. Faraday's ice pail experiment - Wikipedia

    en.wikipedia.org/wiki/Faraday's_ice_pail_experiment

    A gold-leaf electroscope (E), a sensitive detector of electric charge, is attached by a wire to the outside of the pail. When the charged ball is lowered into the pail without touching it, the electroscope registers a charge, indicating that the ball induces charge in the metal container by electrostatic induction. An opposite charge is induced ...

  6. Electrostatic induction - Wikipedia

    en.wikipedia.org/wiki/Electrostatic_induction

    Gold-leaf electroscope, showing induction (labelled polarity of charges), before the terminal is grounded. Using an electroscope to show electrostatic induction. The device has leaves/needle that become charged when introducing a charged rod to it. The leaves bend the leave/needle, and the stronger the static introduced, the more bending occurs.

  7. Kearny fallout meter - Wikipedia

    en.wikipedia.org/wiki/Kearny_Fallout_Meter

    Devised in 1978 by Cresson Kearny, the Kearny fallout meter is an application of the gold-leaf electroscope developed in 1787 by Abraham Bennet. [3] Prior to this, the use of the electrometer principle for radiation detection had seen widespread application in the form of the quartz fiber dosimeter. Professional radiation meters, while more ...

  8. Photoelectric effect - Wikipedia

    en.wikipedia.org/wiki/Photoelectric_effect

    Gold leaf electroscope demonstrating the photoelectric effect. When the electroscope disk is negatively charged with excess electrons, the gold leaves mutually repel. If high-energy light (such as ultraviolet) is then shone on the disk, electrons are emitted by the photoelectric effect and the leaf repulsion ceases.

  9. Quartz fiber dosimeter - Wikipedia

    en.wikipedia.org/wiki/Quartz_fiber_dosimeter

    Gold leaf electroscope showing principle of fiber dosimeter. When ionizing radiation penetrates the inner gas of the electroscope, ions are created. Since the gold leaves are charged positive, the negative ions are attracted to it and neutralize some of the charge, thus causing the gold leaves to close together.