In this article of Water Colour & Purity, we will see scientifically about the colour of water, the spherical shape of a liquid drop, the colour of a waterfall and at last the purity of water.
Water Colour Purity
Water is transparent and nearly colourless liquid. Waterdrop is spherical because the liquid drop tends to be in a state of minimum surface area. Reason of Spherical shape of the water drop is the force. It is Surface tension that try to hold the droplet together.
Mathematically, sphere has the smallest surface volumes, compared to other geometric shapes.
In absence of the external force liquid always want to attain minimum surface area and got spherical shape.
- When all colour gets reflected from the surface of an object, it appears white.
- And also “When light enters from a lighter medium (air) to denser medium (water) some is reflected on the surface and rest is refracted.”
- Waterfall reflects most of the light thus due to most reflection waterfall seems white.
- The same phenomena sugar colloidal solution, mist, paper water vapour, clouds, snow seems white.
Light must become from all direction not from a specific direction.
Purity of rainwater
Natural water contains the dissolved ions within them. Rainwater forms due to a distillation process i.e. evaporation – condensation – precipitation. rainwater is a very dilute solution with very less dissolved solids (1-3 mg/lt).
Rain Water with pH range 6.7 to 7.2 for consumption purpose near coastal area dilution of ion increases which is harmful.
Effect of air when water raining
if the air is full of CO2, SO2, NO2 then all these dissolved in water to form an acid rain which is caused to more harmful to vegetation.
Hence, after suitable modification and alteration of rainwater can be useful for consumption.