Answer
A CHANGING ELECTRIC FIELD
變化的電場
WINDOW QUESTION · ANSWERSTEAM SQUAD
The question
WHICH TYPE OF FIELD LIGHTS AN UNPLUGGED CFL BULB NEAR A PLASMA GLOBE?
沒有接線的 CFL 燈泡靠近電漿球也會發光，靠的是哪一種場？
Why it works
IT INDUCES CURRENT IN THE CFL, LIGHTING IT WITHOUT WIRES
它在 CFL 燈泡中感應出電流，所以不接電線也能發光
See it in action · THE WIRELESS LIGHTBULB
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