Re: [Phys-l] Hewitt's three answers

[Bernard Cleyet <bernardcleyet@redshift.com>]

On 2012, Mar 28, , at 15:29, Ludwik Kowalski wrote:

> Interesting; thanks for sharing. Your observations show that I was wrong, thinking that variations of intensity would not be noticeable.
>
> Ludwik
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> On Mar 28, 2012, at 6:22 PM, Tom Bross wrote:
>
> > I recently took a slow motion video of a drop forming and falling from a spigot at 410 frames per second. I illuminated the area with a 100 W incandescent light bulb and on playback I noticed the variation in brightness of the white wall in the background, no doubt due to the small but noticeable cooling and warming of the bulb's filament. 
> >
> > Sent from my iPhone
> >
> > On Mar 28, 2012, at 4:44 PM, Ludwik Kowalski <kowalskil@mail.montclair.edu> wrote:



I'll refer to my optics tome that give numbers to this when I return from Pete's coffee.

bc used the "flicker" of a 7.5 W incandescent to set the speed of his high end turntable before he became very hearing challenged..