Old (top) and new versions of cookers

solar cookers have been around for over 200 years now. Their use is limited because of shortcomings related to cooking time and a very basic problem of cooking dinner. Two professors at Jodhpur have come up with an improved version of a solar cooker, which they claim addresses the problems. But critics have reservations about the improvized cooker.

Solar cookers work on the principle of converting sunlight to heat, which is used for cooking. Broadly, they come in three designs