(Peter Stickney) wrote in message

Naw - if it's really good, you toss a bit of grass/paper in the air
when you see the flash, measure its displacement when the shock hits
by eye, and do it in your head. While keeping ahead of the crowd, as
in "If you see me running, try to keep up."

(Worked for Ed Teller at Alamagordo. And not only was he faster than
the Data Reduction folks with all their slide rules & Analyzers, he
was more accurate, as well.)

As others have said...it was Fermi, and problems like this became
known as Fermip problems. See, for example
http://encyclopedia.thefreedictionar...rmi%20question

-stmx3