Date: Fri Feb 9 12:54:25 2007

Author: Cliff Bettis

Subject: Re: Discharge Electrometer w Alpha Source

Post:
Re-rebuttal

Dick,

Suppose I use x-rays or gamma rays instead of UV to discharge the
electroscope?

Is it then E&M because the discharge mechanism is mainly ionization instead
of the photoelectric effect?

I am kidding, but I do find it interesting how many ways one can look at
some of these things.

Cliff
----- Original Message -----
From: "Richard Berg"
To:
Sent: Friday, February 09, 2007 10:30 AM
Subject: Re: [tap-l] Discharge Electrometer w Alpha Source


>
> Buttal:
>
> I think the location is correct. The point is creating conductive air
> whatever the source, as D. pointed out. A UV lamp or electrical discharge
> will produce the same result and certainly wouldn't be placed in a nuclear
> category.
>
> Rebuttal:
>
> I think that this demo using UV radiation IS in the atomic/nuclear area,
> because it is the Photoelectric Effect. It should work when the plate is
> charged negative, but not when the plate is charged positive. At least
> that is the way it works for me.
>
> Dick
>
> ***********************************************************************
> Dr. Richard E. Berg, Professor of the Practice
> Director, Physics Lecture-Demonstration Facility
> U.S. mail address:
> Department of Physics
> University of Maryland
> College Park, MD 20742-4111
> Phone: (301) 405-5994
> FAX: (301) 314-9525
> e-mail reberg@umd.edu
> www.physics.umd.edu/lecdem
> ***********************************************************************


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