Why does the rain water in the window pane flow down in a zigzag way?

Answer 1

Place a drop of water on horizontal glass plate gently.

Contrary to our expectation that the contact area should be a perfect circle, the area will have an irregular area.

If we clean the glass thoroughly and repeat the experiment we can see that the area is some what circular.

This shows that only if the glass plate is perfectly clean and has a perfectly plane, t surface (with out any surface waviness) the area of contact will be circular.

The surface tension between the glass and water makes the surface of water to be at an angle called angle of contact.

If the glass contains impurities and if the surface is not perfectly plane then the angle of contact will not be uniform and constant and hence the area of contact is of some irregular area.

In a vertical window pane, the gravity pulls the water drop and and at each point of contact, the surface tension prevents the pull at different angle due to the variation of surface tension at each point due to impurities and surface waviness.

The water moves along the resultant force which is not uniform.

This is the reason that the water is not moving straight down.

If the water goes almost straight down we can conclude that the glass is almost clean.

Answer 2

Ocean Planet - Gojirra Water - Atheist Water Into Wine - Christian lack of existence Papyrus Containing the Spell to maintain Its Possessor adversarial to attacks from He who's contained in the Water - Nile under eternal Oceans Of Sand - Nile the position the River Flows - Collective Soul The Humbling River - Puscifer Cry Me A River - Ten Masked adult men River Oblivion - Wuthering Heights

Answer 3

Water always seeks the path of least resistance. There are always specks of dirt or some unevenness on/in the glass and the water finds a way around it to avoid it.
It's what a river does in miniature.

Answer 4

it is not always the water on the window pain flows in zig-zag manner. it flows evenly when u see it afer water wash. actually there is some dirt particles deposition tht causes resistance and there is diversin in path causing it to go in different path, also it is not always zig-zak but it is not in a comman or straight path

Answer 5

Many reasons. Wind very slight, very little dirt, slightly uneven surface and ....., water will flow and take a path that has least resistance to its flow.

Answer 6

Dirt on the window. Windows may seem clean because you can see right through them, but when you wash windows, the water you squeegee off them is black.

Answer 7

Surface tension

Answer 8

path of least resistance.

Answer 9

its not like that

Answer 10

it is natural