# Certain sharks can detect an electric field as weak as 1.00 μV/m .?

To grasp how weak this field is, if you wanted to produce it between two parallel metal plates by connecting an ordinary 1.50 V AA battery across these plates, how far apart would the plates have to be?

Look at the units! The field strength = [voltage] / [distance]

1.00 * 10^-6 V/m = 1.50 V / distance

distance = (1.50 / 1.00 * 10^-6) = 1.50 * 10^6 m

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