Date: Wed, 9 Mar 2005 14:56:39 -0700

Author: Adam Beehler

Subject: Re: Light bulb demos from Clarence

Post:

On Mar 9, 2005, at 2:04 PM, Matt Lowry wrote:

> Which dovetails onto another question... why, when a bulb burns out,
> does it seem to grow brighter just before popping? I assume it is
> related to the above question and movie.

As the filament heats up, some of its material burns off, resulting in
an even skinnier filament. This increases the resistance and thus the
heat. Right before the filament "pops," it is at its skinniest and
thus most resistance and brightest moment.

Adam Beehler
From pgay@fas.harvard.edu Wed Mar 9 16:58:20 2005

Back