L3-16 FOCUSING OF HEAT WAVES BY MIRRORS L3-16 Demonstrates that concave mirrors can focus heat waves Two parabolic concave mirrors are used to focus heat from a nichrome heater and light a match. L3, PW1 PHYS104 Needs New Photo PHYS270 PHYS105 PHYS106 Geometrical Optics PHYS132 PiP Oct 2013 Safety Equipment: Gloves Needs Improved Writeup