PIRA Classification: 7A30.10
Description: A green LED and an orange LED are placed in liquid nitrogen and are allowed to cool for 10 seconds (or so). When removed from the nitrogen, both LEDs will have shifted color to yellow.
Special Instructions: Additional orange and greens LEDs are in the circuit so a direct comparison can be made.
Setup time: 2 minutes
Safety Issues: Do not cool the LEDs too long.