[Phys-L] Re: light bulb transient

[Jack Uretsky <jlu@HEP.ANL.GOV>]

Hi Michael-
        Turn it on while running a VCR and compare adjacent frames.
                        Regards,
                                Jack

On Sun, 13 Nov 2005, Michael Edmiston wrote:

> What's the primary point of interest here?  Is it the question of
> whether the light bulb is momentarily brighter when turned on?
>
> If that's it, I am aware that some people believe they observe this.
> But I think it's because the light bulb got to its full brightness
> before the irises of their eyes closed down.  If the room is not real
> bright, and you stare at a bulb as it is turned on, you will have the
> impression that it got real bright at first and then dimmed.  I think
> this is a biological phenomenon in the eye rather than physical reality
> in the light bulb.  I don't see how the bulb could overshoot the
> equilibrium brightness, but I have to admit I have never recorded the
> brightness of a light bulb turning on.
>
> Michael D. Edmiston, Ph.D.
> Professor of Physics and Chemistry
> Bluffton University
> Bluffton, OH 45817
> (419)-358-3270
> edmiston@bluffton.edu

--
"Trust me.  I have a lot of experience at this."
                General Custer's unremembered message to his men,
                just before leading them into the Little Big Horn Valley
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