We all are familiar with the concept where electricity can be produced when two electrodes are immersed in an electrolyte. Recently, the researchers from Indian Institute of Science (IISc.) have developed an eco-friendly lamp that runs entirely on salt water. Here the salt water battery uses saline solution as the electrolyte. Vasant Natarajan from the Physics Department of IISc refined on this concept. The overall apparatus consists of a box (approximately 6cm in height and 11cm in length) which is…