what are some easy ways to make a solar cooker for a science project? it needs to be relatively easy and actually able to bake somethingi can't use a magnifying glass.
make a parabolic reflector out of aluminum foil and put the hot dog at the focusParabolic reflectors are difficult, but a hemisphere is a good approximationImagine a sphere and chop off 1/3 of itForm a piece of Al foil to this shapeUse a bowl or a beach ball as something to form the Al foil onUse heavy foil or use 3 or 4 layers so it holds it's shapePut it in the sun, pointing towards the sun, and put a marshmallow at the focal point, which you can find by trial and errorIf you formed it from a beach ball, think of where the center of the beach ball is, that would be the focus.
