Science, asked by singh820, 1 year ago

when water drop of rain fall on water surface we see a semi spherical bubble , why it doesn't take another shape?

Answers

Answered by Dhaval1234
0
Drops are not really spherical. Once they form they start falling and take on a streamlined shape:

None of these drops is spherical, though the really small ones come close, they are both elongated. (I admit, this one is likely polished up by photoshop).

This is a drop forming. Still not spherical, though the detached one on the right starts to form a spherical body due to surface tension - but that flat spot on top bounces and can release still more drops…

The only time a drop could form a sphere is when it is rising… and ceases to rise. The surface tension will then pull the drop into a spere as there is no air flow causing it to change.

Soap bubbles are similar - but are a bit more spherical as they are much lighter. The bubbles tend to be distorted as water flows from the top of the bubble to the bottom - which starts distorting the bubble shape. When enough water flows away from the top, there is insufficent water lubrication (and surface tension) and the water evaporates - resulting in the internal air pressure (which is SLIGHTLY greater than outside as it is what resists the surface tension pulling the bubble smaller) to burst the bubble.
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