I am getting serially downvoted now. Five questions were downvoted in short order. Are the answers I gave so bad?
See:
Links to most of the answers (couldn't find the one about aluminum foil):
https://physics.stackexchange.com/a/492320/4552https://physics.stackexchange.com/a/486605/
https://physics.stackexchange.com/a/486200/4552https://physics.stackexchange.com/a/490427/
https://physics.stackexchange.com/a/486605/4552https://physics.stackexchange.com/a/486200/
https://physics.stackexchange.com/a/491152/4552https://physics.stackexchange.com/a/491152/