A short story, possibly apocryphal ["alternative fact" in today's vernacular], that circulated at NASA during Apollo, had Dr. Feynman lecturing on some subject. At one point, the chalk hit the blackboard, he wrote out an equation [or something like that] and then said, "This is obvious, of course." He paused, turned and left the room, leaving everyone wondering if that was all. A couple of minutes later, he was said to return and continue the lecture with, "Yes, it is definitely obvious."

I don't know if it's true but it sure fits his style.

73,

Fred ("Skip") K6DGW
Sparks NV USA
Washoe County DM09dn

On 4/16/2017 4:05 PM, Craig Smith wrote:
Thank You Ron for the audio clip.

I’ve seen various videos of Feynman’s work and have enjoyed them.   But this 
audio, in addition to his wonderful NYC accent, brought back a sound I do not 
remember hearing in the past 45 years.   And a sound that is precious (in 
retrospect) to me  -  the sound of chalk hitting blackboard.   That “leading 
edge”, the audible signal that something important may follow, is an “attention 
getter” that physicists and mathematicians will always be attuned to.   It can 
be heard about 2 minutes into your clip.

Thank You!


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