16:- solar cooker 
Aim :- to know about solar cooker .
* Why is solar cooker use :- solar energy is been use in many fields for example
    It is use to beat water.
*  On solar we can cook food the without using gas and wood.
*  Food row material ,steel sheet trolley .
*  At a point we focused the sun rays and cooked food .
*  As the direction of the sun changes we have to adjust shuffler
    to fows the sunrays on the cooker .