Solar Cooker

DO NOT LOOK AT THE SUN FOR TOO LONG

AND CERTAINLY NOT THROUGH A TELESCOPE

OR BINOCULARS WITHOUT A SPECIAL LENS

Step 1. Gather your materials: cardboard, foil or insulating material, tape and scissors.

Step 2. Bend the cardboard into a curve so that the sun’s rays can be funnelled to the centre point.

Step 2 complete.

Step 3. Cover the cardboard with a reflective materials, such as foil or insulating material (I had some spare packaging…). Tape it all up so that the foil covering won’t get blown away.

Step 4. Put a bowl of water, or a piece of bacon or a marshmallow on a plate in the point shown here, this spot will get the maximum benefit of the channelled rays of the sun. You will need to move it around until the sun’s rays are directly on the centre. This picture was taken in the shade of a handy black wall before the sun came round. There is a jug of water nearby just in case of fire.

Step 6. Leave for a couple of hours and then test the water.

Result: the bacon had dried and showed signs of being cooked and the water felt warm. The temperature at the ‘sweet spot’ where all the light from the sun was being channelled was around 50 degrees Centigrade.