I am planning to make a gadget for making a soft-boiled egg using the heat from the sun using a mirror or aluminum foil to reflect heat in order to boil the egg... gets? :)
you're not really after their ability to conduct but rather their ability to reflect light. As they are both shiny metallic surfaces they will both reflect a lot of light/heat, if there is some difference in their quality it probably wont be significant in light of what you want to use it for. Just use mirrors, they are more precise when it comes to directing the light which you'll want to do. Jim.
see aluminum is a better conductor of heat than glass but what you need here is not the conduction property but the property of reflection and absorbance i would suggest you to go with a mirror reflector and a aluminum vessel so that glass reflects more heat (due to less absorbance of the material ) and aluminum absorbs most of it and conducts it to the egg.
aluminum is a much better conductor of heat. But for your application, you don't want a good conductor of heat, you want a good reflector of heat and light, and a mirror is better for that. But aluminum foil is also good, and lighter and easier to setup. .
Better reflector is mirror but better conductor is aluminium
for reflect the waves mirror is the best thing for the same,because its surface is shining and the surface whisch shines that reflect the light more.
