What is reverse osmosis?

Explanation

Reverse Osmosis follows the same principles o osmosis,but in the reverse direction .In this process movement of water is reversed by applying pressure to force the water against a concentration gradient of the solution.
In regular osmosis,the water molecules move from the higher concentration (pure water-hypotonic)to lower concentration (salt water=hypertonic).But in reverse osmosis,the water molecules move from the lower concentration (salt water=hypertonic) to higher concentration (pure water=hypotonic)through a selectively permeable membrane.

Uses: Reverse osmosis is used for purification of drinking water and desalination of seawater.