Water in a straw

John dips a straw in the water. When he completely takes out the straw, he notices that the gravity pulls out all the water from it.

He again dips the straw in the water. This time he seals the top of the straw by a finger so that air cannot pass through it. He then slowly takes out the straw completely from the water. What change will he observe in the level of the water in the straw?

Details and Assumptions:

  • The water sticking to the walls of the straw due to surface tension is neglected.
  • The capillary rise is neglected.

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