Try to think and prepare your own solar appliance. Discuss with your teacher.

Explanation

1. We can prepare a solar cooker.
2. We take an umbrella and cover its cloth with silver paper.
3. When we unfold it. The silver paper comes to the top.
4. It acts like convex mirror and the heat it received transfer to the centre or the handle of umbrella.
5. We dip the handle of umbrella into bowi in which we want to cook.
6. Thus the heat received is used to cook the item present in the bowl.
7. In this way, we can prepare a solar cooker with least expense.