Question

water is transparent when is in a container but when it falls from the tap it has a shadow. Why that is so?

Answer 1

Explanation:

Depends on nature of flow and on the position of the light source also. Water reflects light rays approaching near normal.

Also sometimes we have a flow with many layers intermixed with air/vapour (like a tap that has filter attached to it, we have many streams and air in between) For such cases we see that there are multiple refractions and reflections possible and very little light might make it to the wall casting a shadow.

Answer 2

Depends on nature of flow and on the position of the light source also. Water reflects light rays approaching near normal.

Also sometimes we have a flow with many layers intermixed with air/vapour (like a tap that has filter attached to it, we have many streams and air in between) For such cases we see that there are multiple refractions and reflections possible and very little light might make it to the wall casting a shadow.