A student prepared a model solar cooker but it was not working what may be the reason explain

A student prepared a model solar cooker but it was not working what ma

1.	A student prepared a model solar cooker but it was not working what may be the reason explain
Answer» 1. He has not adjust the reflecting surface according to sunlight. 2. He has used plane mirror as reflecting surface. 3.He has not painted the inner surface black. These could be the reasons that it was not working properly...