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Article: New clues to the fifth force and its source.
- Article from:
- Science News
- Article date:
- October 3, 1987
- Author:
CopyrightCOPYRIGHT 1987 Science Service, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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New Clues to the Fifth Force and Its Source
Physicists have recognized four kinds of force in nature. Two of these, gravity and electromagnetism, have a potentially limitless range. The other two, the "strong interaction' and the "weak interaction,' are hardly perceptible beyond the diameter of an atomic nucleus.
Now there is growing evidence for a fifth force, which would be of middle range, between 10 meters and a kilometer. The latest experiment, done in the Cascade Mountains of Washington and said to be more sensitive than previous ones, shows a positive effect that may actually be this fifth force.
The idea of a fifth force arose from ...