- #1
zorro
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I observed something odd this evening.
When I inverted my ball point pen (writing side upwards-perpendicular to the ground level), there was no change in the level of ink. To my surprise, the ink started coming downwards (towards the open end of the refill) when I wrote with it ( inverted ) on an inverted book. If gravity is the reason for this, then why the ink did not move downwards in the first case?
thanks
When I inverted my ball point pen (writing side upwards-perpendicular to the ground level), there was no change in the level of ink. To my surprise, the ink started coming downwards (towards the open end of the refill) when I wrote with it ( inverted ) on an inverted book. If gravity is the reason for this, then why the ink did not move downwards in the first case?
thanks