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the force of gravity and say magnetism varies inversely by the square of the distance of separation D squared.Why? and why if the factor is EXACTLY D squared, does the force not become infinite at source.

However if the field isn't exactly a 1/r^2 force then the mass of the photon wouldn't be zero.

the force of gravity and [electric charge] varies inversely by the square of the distance of separation D squared

why if the factor is EXACTLY D squared, does the force not become infinite at source

say magnetism

why if the factor is EXACTLY D squared, does the force not become infinite at source?

Quote from: PeteHowever if the field isn't exactly a 1/r^2 force then the mass of the photon wouldn't be zero.Lost! Could you explain that, please.