5D20.60 - Conduction in Glass

Conduction in glass

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PIRA Classification: 5D20.60

Description: 2 light bulbs are placed in series; however, one bulb is broken in order to expose the glass stem inside. When the circuit is switched on, the intact bulb doesn't light. A torch is then used to heat the glass stem until it becomes molten, causing the second bulb to light. The flame is removed and the bulb remains lit as the current keeps the glass stem hot.

Special Instructions: Aim the torch directly at the glass stem.

Condition: Good

Setup time: 2 minutes

Safety Issues: Things get hot.