International Physicists' Tournament 2020: Electrostatic Copier

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The discussion centers on the International Physicists' Tournament 2020 problem involving the recovery of text from electrified sheets of paper. Participants suggest that the mechanism resembles a photocopier, but note the complexity of optics involved in traditional photocopying. There is confusion about the analysis of the electrical pattern formed on the sheets and how it can be utilized to restore the text. Participants seek clarification on the principles behind the electrical patterns and their application in achieving high-resolution text recovery. Understanding these concepts is crucial for developing an effective solution to the problem.
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Summary:: If you rub against each other two sheets of paper, one of which contains text, they become
electrified. The electrical pattern that is formed on the clear sheet may be analyzed later to
restore the text, depending on the way the text was created. Propose and build a setup to recover
an image of the original text with the highest possible resolution.
(International Physicists’ Tournament 2020)

This problems resemble a photocopier and i also think a colour photocopier is the solution for this problem. But the photocopier mechanism includes some optics knowledge and some quite complex parts compared to the example given in the problem. Also, i do not understand much about the electrical pattern formed, about how it can be analysed. I hope someone can help me about the electrical pattern and this problem.
 
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