A solar cooker jumped into our world when we realized the enormous potentials of sunlight remain untapped, while there is a continuous soaring need for energy. While conventional sources of energy like fossil fuels do offer some relief from the increasing demand, it cannot be met completely by fossil fuels. Moreover, they are surely on a decline. They are bound to be finished off in a few centuries, and with reserves of fossil fuels gone, there would be little to subsist on.
A solar cooker is a device that converts the latent energy of sunlight into heat energy that is used to cook food. Because it doesn't require any fuel or any form of investment to keep it going, it is quite economical to handle. After the initial investment that is required to buy them, very little money needs to be spend in maintaining a solar cooker or for operating one.
Because solar cookers don't burn any fossil fuels, so there is minimal of pollution involved in using one. This makes them all the more viable. They are the ideal when one is out for a trekking or camping expedition. The trick in a solar cooker lies in the ability of the mirror to converge sunlight to a single point making it potent and powerful enough to cook food. For this purpose, they are made of material that reflect and radiate heat.
The solar cooker works the best when it can do its best to concentrate sunlight on the food to be cooked. The amount of sunlight at the time of cooking determines the time taken to cook the food, besides the quantity of food that has to be cooked. It has been generally observed that food is cooked the fastest when the cooker is used two hours before and after noon.