Turn Your Computer Into an Electronic Blackboard and Visualize E&M Fields
Fast

Physics Academic Software Releases EM FELD

February 18,1994 -- EM FIELD helps you visualize electric fields produced
by point and line charges and magnetic fields produced by current-carrying
wires. The program offers a modern, mouse-oriented graphical interface
that makes it easy to set up a configuration of charges or currents and
use the mouse to view electric and magnetic field vectors, directional
arrows, and field lines.

Developed by David Trowbridge of Microsoft Corporation and Bruce Sherwood
of Carnegie Mellon University, EM FIELD encourages rapid, qualitative
exploration of electric and magnetic fields. You can study various aspects
of electric potential, including equipotential surfaces and potential
difference. Unique features include the ability to explore Gauss's law and
Ampere's law as they pertain to your own charge and current
configurations. As you draw a Gaussian surface or Amperian path with the
mouse, you see a graphical representation of the contributions to the
integral, and upon closing the surface or path, the amount of enclosed
charge or current is displayed. The program also includes a game in which
users try to determine the locations and magnitudes of hidden charges or
currents.

EM FIELD is highly effective as a lecture demonstration device. It helps
instructors present notoriously difficult topics simply and accurately.
Equally valuable as an independent student activity, the program helps
students gain an intuitive, physical feel for electric and magnetic fields
by offering a non-traditional forum for exploration and discovery.

Reviewers attest to the software's educational utility. "EM FIELD builds
intuition and promotes a qualitative understanding of the physics
involved," says Peter Cramer, Case Western Reserve University. John
Mallinckrodt, California State Polytechnic University, says the program is
"well designed, easy to use, and genuinely instructive." And Don Kelly,
Miami University, Ohio, states that it "helps students visualize EM
fields--in a hurry! Its speed is most impressive."

EM FIELD is published and distributed by Physics Academic Software, which
is a project of the American Institute of Physics in cooperation with the
American Physical Society and the American Association of Physics
Teachers, as part of a continuing series of educational software from
PAS.

EM FIELD is available for both PC and Macintosh computers. The PC version
requires a PC with VGA graphics, 640K RAM, DOS 3.3 or later, a
Microsoft-compatible mouse, a 3.5" disk drive, and a hard disk. A math
coprocessor and printer with graphics capability are highly recommended.
The Macintosh version requires a Macintosh Plus computer or later with
system software version 6.0 or higher. A printer with graphics capability
is recommended.

EM FIELD may be purchased from Physics Academic Software for $49.95 plus
$3.50 shipping and handling for the first package ($12.50 foreign air
mail) and $.75 ($4.00 foreign) for each additional package. Lab Packs,
which include ten copies of the software and one User's Manual, are
available for $149.95.

For a limited time, you can purchase the entire PAS collection, with or
without Lab Packs, and save up to 20% off the regular price. Physics
Academic Software offers a no-risk guarantee by providing a full refund
for packages returned within 30 days.

PAS also offers a Standing Order Plan, which brings the latest in
innovative physics courseware to your door, along with exceptional
savings. When you join the Standing Order Plan, you will automatically
receive each new PAS program, with or without Lab Packs, and save up to
20% off the list price.

Orders and requests for the Physics Academic Software 1993-1994 Catalog of
Programs should be directed to The Academic Software Library, Campus Box
8202, North Carolina State University, Raleigh, NC 27695-8202. By
telephone, call (800) 955-TASL or (919) 515-7447; FAX (919) 515-2682.

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