In what can be termed as a path breaking step to provide a cost effective, environment friendly and readily available source of illumination, Jaya Kumar, coordinator at the Bharatiya Vigyan Sammelan, along with a student of Lovely Professional University (LPU), Manoj Kumar replicated an Indonesian concept that uses sunlight to illuminate dark rooms.
Termed as 'Solar Water Bottle,' the device which is marked by its simplicity, yet effectiveness was put on display at the Bhartiya Vigyan Sammelan and Expo 2012, at Lovely Professional University campus, New Delhi. The Solar Water Bottle can yield illumination equivalent to that of a 100 W bulb.
The invention if adopted on a mass scale has the potential to illuminate crores of households based in slum areas across the country and abroad. What makes the invention fascinating is the fact that it does not call for any expenditure to ensure light during the day inside houses which have no access to electricity.
The inventors made use of the phenomenon of multiple-reflection of light within a fluid media — a homogenous solvent of water, bleaching powder, soda, salt and vinegar. The solvent helps in the convergence of light rays and in producing bright illumination.
While bleaching powder, soda and salt help in scattering light, vinegar helps in making light denser for reflection. On display was a transparent glass bottle (a normal 1.5 litre coca cola bottle) filled with the solvent.
It was fixed on the roof of a dwelling in such a way that half was exposed to sunlight, while the other half peeped into the room through the ceiling. When natural sunrays enters the water filled glass bottle, it undergoes multiple reflection and produces high intensity illumination capable of providing substantial light indoors.
Termed as 'Solar Water Bottle,' the device which is marked by its simplicity, yet effectiveness was put on display at the Bhartiya Vigyan Sammelan and Expo 2012, at Lovely Professional University campus, New Delhi. The Solar Water Bottle can yield illumination equivalent to that of a 100 W bulb.
The invention if adopted on a mass scale has the potential to illuminate crores of households based in slum areas across the country and abroad. What makes the invention fascinating is the fact that it does not call for any expenditure to ensure light during the day inside houses which have no access to electricity.
The inventors made use of the phenomenon of multiple-reflection of light within a fluid media — a homogenous solvent of water, bleaching powder, soda, salt and vinegar. The solvent helps in the convergence of light rays and in producing bright illumination.
While bleaching powder, soda and salt help in scattering light, vinegar helps in making light denser for reflection. On display was a transparent glass bottle (a normal 1.5 litre coca cola bottle) filled with the solvent.
It was fixed on the roof of a dwelling in such a way that half was exposed to sunlight, while the other half peeped into the room through the ceiling. When natural sunrays enters the water filled glass bottle, it undergoes multiple reflection and produces high intensity illumination capable of providing substantial light indoors.