What evidence supports the inverse square law in Coulomb's law?

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SUMMARY

The inverse square law in Coulomb's law is supported by precise measurements conducted using a torsion balance. Charles-Augustin de Coulomb established that the electrostatic force between charges is inversely proportional to the square of the distance between them, denoted as ~1/r². Modern experiments confirm this relationship with an accuracy of up to 15 decimal places, validating Coulomb's initial findings.

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  • Torsion balance operation and principles
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yaseen shah
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how columb knew that the force between the charge is inverse square law in nature
 
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With careful measurements with the use of a torsion balance () he saw it was ~1/r². Today we've tested that the power of r is exactly 2 to about 15 decimals or so.
 
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