On 8/28/2013 2:05 PM, Mike Waters wrote:
Absolutely it is an illusion. IIRC, that was erroneously introduced into
textbooks around 1970 the same time as the "electricity flows from positive
to negative" nonsense. Whoever came up with the latter never heard of
electron flow in a vacuum tube, among other things.
You are quite right. The vacuum tube hadn't been invented yet when + to
- (conventional current) was defined although you're a bit off on the
date. EEs have used conventional current since there have been EEs and
it was defined by Ben Franklin.
73
Roger (K8RI)
73, Mike
www.w0btu.com
On Wed, 28 Aug 2013 03:54:29 -0400, K8RI wrote:
They still refer to "hole flow" in introductory semiconductors.
REPLY:
"Hole flow" is an illusion, much like the moving lights on a theater
marquee. If it helps to understand things fine, but holes don't move. It's
more accurate to say a hole is created in one atom and disappears in
another. For a brief time while the electron is in motion, there are
actually two holes. Neither one "moves".
73, Bill W6WRT
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