15
Take-Home Theme Packet #3:
Magic Patch
Magic Patch
·Place the patch on your wrist and perform the “vampire test.”
·The “Magic Patch”
changes color with the heat
from your body. The “living dead”
give off no heat!
·Where do the colors come from?
·Does anyone see a vein or artery?
·This is an example of “selective reflection” by liquid crystals, painted onto the black paper.
·Liquid crystal are “ordered,” just like the students across the page.
·Scientists use liquid crystals to
build displays for watches and
computer games.
build displays for watches and
computer games.