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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Sajan sarthak Best Answer
+ shows one direction - shows another direction of Magnetic polarity. here 5 Magnetic reversal is shown only see one side of MOR. Extra info.:- The time between magnetic reversals on the Earth is sometimes as short as 10,000 years and sometimes as long as 25 million years; the time it takes to reverse is only about 5,000 years.